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Anonymous users2024-02-16You develop something called a "question recorder" and record it, and that's it.
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Anonymous users2024-02-15Upper bottom of trapezoidal = trapezoidal area 2 high - lower bottom. The lower bottom of the trapezoid = the area of the trapezoid 2 high - the upper bottom.
Trapezoidal area = (upper bottom + lower bottom) height 2
Multiply both sides of the original formula by 2 to get.
Trapezoidal area 2 = (upper bottom + lower bottom) x height.
Divide the two sides by the high.
Trapezoidal area 2 high = upper bottom + lower bottom.
Move the item, got. Upper bottom = trapezoidal area 2 high - lower bottom.
The formula for the bottom is the same, the bottom of the trapezoid = the area of the trapezoid 2 high - the top bottom.
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Anonymous users2024-02-14Top bottom + bottom bottom ) High 2 = Area (Top bottom + 50) *2500 2 = 20000 (Top bottom + 50) *2500 = 40000 (Top bottom + 50) =16 Top bottom = 35 impossible !The side length must be > 0 !!
Trapezoidal upper bottom: area 2 high lower bottom 20000 2 2500 50 40000 2500 50 16 50 34cm
The calculation method of trapezoidal area is: (upper bottom lower bottom) high 2 sides of the shed volume unit should be the square number, even if you write the quadratic omission, this topic is not reasonable, and there is no reason to be a negative macro after the calculation of the burning Therefore, the upper bottom = 20000cmx2 2500cm 50cm = 34cm
34 + 50) times 2500 2 = 20000cm so the wer is-34
Upper bottom + lower bottom ) x height ] 2 = trapezoidal area Let x be the upper bottom of the trapezoid [(x+ 50 cm) x 2500 cm ] 2 = 20000 cm*2 ( x+ 50 cm ) x 2500 cm = 40000 cm*2 ( x + 50 cm ) 16 cm x = 34 cm Therefore, the upper bottom of the trapezoid is - 34 cm. The top bottom of the trapezoid cannot be negative, because if the top bottom is negative, this cannot be a trapezoid at all.
Reference: Yourself.
Calculated by vertical range, the upper bottom of the trapezoid is h cm (50+h)x2500 2=20000 (50+h)x2500 2x2=20000x2 (50+h)x2500 2500=40000 2500 50+h-50=16-50 h=-34, and the upper bottom of the trapezoid is -34cm
Reference: me
Upper bottom + lower bottom) * height 2 = area (top bottom + 50) * 2500 2 = 20000 top bottom + 50 = 16 top bottom = -34 does not exist this trapezoidal is not the problem is wrong.
Reference: Yourself.
The bottom is x (x+50)*2500 2=20000 x is a negative number.
Area = ((upper bottom + lower bottom) x height) 2 Let the upper bottom be a 20000=((a+50)x2500) 2 40000=(a+50)x2500 16=a+50 a=-34 There is a negative number ?!!Not knowing the meter=.= Whether there is a mistake in the question.
34cm
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Anonymous users2024-02-13The upper bottom of the trapezoid = the area of the trapezoid x 2 height - the lower bottom. A trapezoid is a quadrilateral with only one set of opposite sides parallel. The two parallel sides are called the bottom edge of the trapezoid:
The longer bottom edge of Qing Bichen is called the lower bottom, and the shorter bottom edge is called the upper bottom; Another reputation is called the waist on both sides of the Zen outside; The perpendicular segment sandwiched between the two bases is called trapezoidal height.
Trapezoidal nature. 1. The two waists of the isosceles trapezoidal are equal.
2. The two bottom angles of the isosceles trapezoidal on the same bottom are equal.
3. The two diagonals of the isosceles trapezoidal are equal.
4. The isosceles trapezoidal shape is axisymmetric diagram, and the symmetry axis is the straight line where the line connecting the midpoint of the upper and lower bottom is located (the straight line that passes the midpoint of the two bottoms).
2. Trapezoidal judgment.
1. A trapezoid with equal waists is an isosceles trapezoid;
2. A trapezoid with two equal angles on the same bottom is an isosceles trapezoid;
3. A trapezoid with equal diagonal lines is an isosceles trapezoid.
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Anonymous users2024-02-12Upper bottom of trapezoidal = trapezoidal area 2 high - lower bottom. The lower bottom of the trapezoid = the area of the trapezoid 2 high - the upper bottom.
Analysis: Trapezoidal area = (upper bottom + lower bottom) height 2
Multiply both sides of the original formula by 2 to get.
The trapezoidal surface is ready for hunger 2 = (upper bottom + lower bottom) x height.
Divide the two sides by the high.
Trapezoidal area 2 high = upper bottom + lower bottom.
Move the item, got. Upper bottom = trapezoidal imitation macro area 2 high - lower bottom.
The formula for the bottom is the same, the lower bottom limb orange of the trapezoid = trapezoidal area 2 high - upper bottom.
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Anonymous users2024-02-11Divide the area by the highest, multiply by 2, and subtract the bottom to get the difference at the top.
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Anonymous users2024-02-10The upper bottom of the trapezoid = the area of the trapezoid x 2 height - the lower bottom. A trapezoid is a quadrilateral with only one set of opposite sides parallel. The two parallel sides are called the bottom edge of the trapezoid:
The longer bottom edge is called the bottom bottom, and the shorter bottom edge is called the bottom bottom; The other two sides are called the waist; The perpendicular segment sandwiched between the two bases is called trapezoidal height.
1. The two waists of the isosceles trapezoidal are equal.
2. The two bottom angles of the isosceles trapezoidal on the same bottom are equal.
3. The two diagonals of the isosceles trapezoidal are equal.
4. The isosceles trapezoidal shape is an axisymmetric figure, and the symmetry axis is the straight line where the line connecting the midpoints of the upper and lower bottoms is located (the straight line passing through the midpoints of the two bottoms).
1. A trapezoid with equal waists is an isosceles trapezoid;
2. A trapezoid with two equal angles on the same bottom is an isosceles trapezoid;
3. A trapezoid with equal diagonal lines is an isosceles trapezoid.
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Anonymous users2024-02-09Upper bottom of trapezoidal = trapezoidal area 2 high - lower bottom.
The lower bottom of the trapezoid = the area of the trapezoid 2 high - the upper bottom.
Analysis: trapezoidal area zhuan = (upper bottom + lower bottom) height 2, multiply the two sides of the original formula by 2, and the trapezoidal area of the bureau is 2 = (upper bottom + lower bottom) x height.
The two sides are divided by the height of the first cavity to obtain a trapezoidal area of 2 high = upper bottom + lower bottom.
Move the item, get the upper bottom = trapezoidal area 2 high - lower bottom.
The formula of the bottom is the same, the bottom of the trapezoid = the area of the trapezoidal 2 high - the upper bottom.
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Anonymous users2024-02-08Generally, if the trapezoidal is known to be the upper bottom, the lower bottom and the height, the hypotenuse length can be calculated, generally one end is located at the top of the hypotenuse, and the bottom of the trapezoid forms a right-angled triangle, and then according to the theorem of the right-angled triangle to calculate the hypotenuse length, one side of the right-angled triangle is a, the other side is b, then the hypotenuse length of the trapezoid is the wheel lead number (a 2 + b 2) state Tong boring.
The two parallel sides are called the bottom edge of the trapezoid, and the long side is called the lower bottom; The two sails that are not parallel are bent and called the waist; The perpendicular segment sandwiched between the two bases is called trapezoidal height. A trapezoid with one waist perpendicular to the bottom is called a right-angle trapezoid, and a trapezoid with two equal waists is called an isosceles trapezoid. Isosceles trapezoidal is a special trapezoidal shape, and its determination method is similar to that of isosceles triangle.
Simple formula for calculating the oblique length of a triangle:
The formula for calculating the oblique length of a normal triangle is: if the three sides of a triangle are a, b, and c, then c-a-b=c.
Right triangles can be formed using the Pythagorean theorem, c a+b.
The Pythagorean array is a positive integer array (a,b,c) satisfying the Pythagorean theorem a+b c, where a,b,c is called the Pythagorean number. For example, (3,4,5) is a set of Pythagorean arrays.
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Anonymous users2024-02-07Hello: According to the area formula, the upper bottom = area 2 high - lower bottom.
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Anonymous users2024-02-061. Upper bottom = area 2 high - lower bottom sail trap.
2. Bottom = Area 2 High - Top Bottom.
3. Upper bottom + lower bottom = area 2 high.
The above three formulas are derived from the transformation of the area formula of the trapezoid.
The formula for the area of the trapezoid is: area = (upper bottom + lower bottom) height 2.
Multiply both sides of the equation by 2 at the same time to get: area 2 = (top bottom + bottom bottom) high, and divide both sides of the equation by high at the same time to get: top bottom + bottom bottom = area 2 high.
Extended Information: The Nature of Trapezoids.
1. The upper and lower bottoms of the trapezoidal shape are parallel;
2. The median line of the trapezoid, parallel to the two bottoms and equal to half of the sum of the upper and lower bottoms;
3. The isosceles trapezoidal diagonal is equal.
Other formulas for trapezoids:
1. The area formula of the trapezoid: the median line is high, represented by letters: l·h.
2. The trapezoidal area perpendicular to each other is: diagonal diagonal 2.
3. The circumference formula of trapezoid: upper bottom + lower bottom + waist + waist.
4. The circumference formula of the isosceles trapezoid: upper bottom + lower bottom + 2 waist.
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