What is the answer to the area of a trapezoid, and what is the area of a trapezoid?

The trapezoidal area is not necessary because it is unstable and in the area is not fixed.

If you find the side of the trapezoidal method: one endpoint at the bottom, so that a straight line is parallel to the waist, which is known as the side of the parallelogram (the long side, with three sides and a known demand for the triangle is high, just at the bottom of the subdivision perpendicular to the next vertex, i.e. this period is also high in the triangle parallelogram high.

However, this question does not constitute a reason, trapezoidal: .

Let ad bc, ad = , bc = , ab = 86, cd = d to be paid electronically de ab bc, then abed is a parallelogram, de = ab = 86, be = ad =

ce = bc-be = =

In DCE, cd = , de + ce = 86 + = , cd > de + ce, cannot form a triangle so that the original title of the trapezoid does not exist.

Also, if the quadrilateral in general, the area is not unique.

The sum of the top bottom plus the bottom bottom is multiplied by the height divided by two.

1. The area formula of the trapezoid: (upper bottom + lower bottom) High 2 The area of the trapezoid is equal to half of the product of the sum of the upper and lower bases and the height. If the upper and lower bases of the trapezoid are represented by a and b respectively, and the height is represented by h, the area of the trapezoid is s=(a+b) h2.

2. The area formula of the trapezoid: the median line is high.

According to the fact that the length of the median line of the trapezoid is equal to half of the sum of the upper and lower bases, the area of the trapezoid is also equal to the product of the median line and the height. If the median line of the trapezoid is denoted by m and the height is denoted by h, the area of the trapezoid is s=mh.

3. The trapezoidal area perpendicular to each other is: diagonal diagonal 2.

The two waists of the waist trapezoid are equal, the two base angles of the isosceles trapezoid on the same base are equal, the two diagonals of the isosceles trapezoid are equal, the isosceles trapezoid is an axisymmetric figure, and the axis of symmetry is the straight line where the line connecting the midpoint of the upper and lower bases is located.

The area of the trapezoid is derived from the area of the parallelogram, which is found in the mathematics of the fifth grade of primary school, and its formula is: the area of the trapezoid = (upper bottom + lower bottom) x height 2, which is represented by letters as s=(a+b) h 2

Trapezoidal Area Formula:The trapezoidal area (top bottom, bottom bottom) is 2 high

High trapezoidal area 2 (top bottom, bottom bottom).

Upper bottom trapezoidal area 2 high lower bottom.

Lower bottom trapezoidal area 2 high upper bottom.

The nature and determination of the trapezoid:1. The upper and lower bottoms of the trapezoidal shape are parallel;

1. The trapezoidal median line (the line connected by the midpoint of the two waists is called the median line) is parallel to the two bottoms and is equal to half of the sum of the upper and lower bottoms.

Decide. 1. A group of quadrilaterals with parallel sides and another group of quadrilaterals with non-parallel sides is trapezoidal.

2. A group of quadrilaterals with parallel and unequal opposite sides is trapezoidal.

The area formula for the trapezoid is shown in the figure below:

The area formula for the trapezoid.

The trapezoidal area formula = (top bottom + bottom bottom) * height 2, which is derived from the area formula of the parallelogram.

Because the area of the trapezoidal is two (top bottom, ten bottom, bottom bottom) x height 2

So this problem can be solved.

Two 14 (m) two square meters two square meters).

A: The area of the trapezoidal is square meters.

s=12(a+b)h trapezoidal has a length of the upper base, a length of the lower base is b, a height of h, and an area of s

Two lines parallel to each other, a short one is called the bottom and the other is called the bottom, and the vertical distance between the two parallel lines is called high.

So the surface should be, (top bottom + bottom bottom) half of the high result.

Trapezoidal area = flat quadrilateral area - 1 3 (length of the upper edge of the flat quadrilateral - length of the upper edge of the trapezoid) height.

The area formula for a trapezoid: (top and bottom) height 2

The diagonal multiplication is conditional, and the diagonal must be perpendicular.

Because after perpendicular, a diagonal line divides the trapezoid into two triangles, so that the area of the two triangles is found, and the area of the trapezoid is found.

The trapezoidal area (top bottom, bottom bottom) is 2 high

s=(a+b)xh÷2

Text indication: area = (top bottom + bottom bottom) height 2

The letter indicates: s=(a+b)h2

Hee-hee: I'm a 6th grader!

The trapezoidal area formula is, of course:

Upper bottom + lower bottom) High 2

For example, the upper bottom is 5cm, the lower bottom is 6cm, and the height is 3cm, then it should be:

A: Its area is:

Is the answer satisfactory? ，

The median line is high.

Upper bottom + lower bottom) High 2

The sum of the upper and lower bottoms, multiplied by the high, divided by 2