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Anonymous users2024-02-06Solution: (1) There is no limit to the drawing tools, as long as the points a, b, and c are on the same circle; ......Friends .........4 points.
2) There is no limit to the drawing tools, as long as the points a, b, and c are on the same parallelogram vertex; ...4 points.
3) r=ob==, 1 point.
s o=r2= , 1 point.
S parallelogram = 2s abc = 2 42 sin60 = 8 ,...State Forest....1 point.
s o > s parallelogram Choose to build a circular flower bed with a larger area. …Good deeds macro ......1 point.
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Anonymous users2024-02-051 Take the midpoints of the three sides and connect the three midpoints in pairs to form 4 regular triangles, which are equal in area.
2 Take the midpoint of three sides, connect one vertex with the midpoint of the opposite side, and then connect this midpoint with the midpoint of the other two sides to form two regular triangles and two isosceles triangles, which are equal in area. (Equilateral or equal base is the same height, so the area is equal).
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Anonymous users2024-02-04There are four methods, see the picture, it didn't come up, ** can only pass it on one piece, express regret!
It can only be explained.
The fourth method is: the figure in the lower left corner, change the midpoint to the two bottom points on the vertical line, and then divide the left and right right triangles into two triangles of the same height as the bottom.
Hope it helps!
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Anonymous users2024-02-03My computer doesn't have a drawing function. You can try to make a big one with 4 equilateral triangles, three with the tip up and one tip down, just like in the first picture.
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Anonymous users2024-02-02The school should make a parallelogram flower bed, the area of this flower leak ear is 48 in the state of the tribe, and the bottom of the land is 10m high.
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Anonymous users2024-02-01The actual height of the cylinder is useless in this question.
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Anonymous users2024-01-313 7 = 21 (m).
A: The circumference of this parterre is 21 meters
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Anonymous users2024-01-30A total of soil needs to be filled with stuffy cubic meters of ant stoves.
Please click on the slag in the bottom right corner.
Answer] Thank you.
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Anonymous users2024-01-29Not counting the vertices, 9-2=7 for each edge
The big three rocks know the angular shape of three thick Kai strip edges, composed of six small triangular edges, planted flowers: 6*7+6=48 Sun Min.
The whole flower bed: 9*7+6=69 plants.
When the sum of the three sides of the triangle is greater than the third side, the triangle is obtuse and acute. When the sum of the three sides of a triangle satisfies the sum of the squares of the two right-angled sides equals the square of the third side, the triangle is a right-angled triangle.
From the known, according to the cosine theorem, we know that a=30°,(1):b=60°(2):s=1 4bc, and from the mean inequality we get bc<9 4, so the maximum value is 9 16
1.50 degrees is the bottom angle.
Then the other bottom angle is 50 degrees, and the top angle is 80 degrees. >>>More
The area of the triangle is s=(base * height) 2
If the height is x, then 20=8x 2 >>>More
Such questions can be cut and patched.
Combine the numbers to make the graph, then place the triangle in a rectangle (the three vertices of the triangle are on the sides of the rectangle), and subtract the other small triangles from the rectangle to get the required triangle area. >>>More