The area of a parallelogram is 64 square decimeters, and the area of a triangle with the same base and height is 64 square decimeters______ Square decimeter

64 △ 2 = 32 (square decimeter) a: the area of a triangle with the same base and height is 32 square decimeters, so the answer is: 32

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1. The side length of the square is 10 cm. The area of triangle a is 20 cm less than that of triangle B. find the length of line ab
2. The side length of the square is 10 cm. The area of triangle a is 20 cm less than that of triangle B. find the length of line ab
3. The circumference of an isosceles triangle is 16 cm, and the height at the bottom is 4 Li wood. Find the length of each side of the triangle`
4. The bottom of a triangle increases by 1 / 10, the height decreases by 1 / 10, and the area decreases by several parts
5. How to draw three figures with an area of 10 square centimeters?
6. The overlapped part of a graph accounts for 18% of the area of the large circle and 15% of the area of the small circle. (1) if the area of the large circle is known to be 25 square decimeters, calculate the area of the small circle. (2) if the area of the overlapped part is 25 square centimeters, then what is the total area of the graph?
7. The area of the overlapping part of the two figures is equivalent to 2 / 13 of the area of the large rectangle and 3 / 10 of the area of the small rectangle 1: The area ratio of large rectangle to small rectangle is (:) 2: If the area of the overlap is 18 square centimeters, the total area covered by the two rectangles is () square centimeters
8. As shown in the figure, ∠ C = 90 ° in △ ABC, AE bisects ∠ BAC, BD ⊥ AE intersects AE extension line at point D. if ∠ EBD = 24 °, what is ∠ EAB equal to A.12 B.24 C.33 D.66
9. The circumference of a rectangle is 56 cm, and its width is known to be 12 cm. Its area is______ ．
10. It is known that the width of a rectangle is half of its length, and its circumference is 3.6 meters. How many meters is the width and area of this rectangle? Write out the calculation steps
11. In the triangle ABC, D and E are the midpoint of BC and AC respectively, ad and be intersect at O. given that the area of triangle ABC is 1, calculate the area of triangle BOD
12. The bottom is 12.56cm, the height is 8cm triangle area ..
13. If the length of the hypotenuse of an isosceles triangle is a, then its area is?
14. The two bases of a parallelogram are 6 decimeters and 4 decimeters in length respectively. One of the parallelogram is 5 decimeters high and the area of the parallelogram is 5 decimeters How many square decimeters? To calculate formula, method
15. The base and height of the parallelogram increase by 1 / 3, and the area of the parallelogram increases by several parts
16. Parallelogram has a certain area, its bottom and height______ (whether in inverse proportion) reason:______ ．
17. In order to keep the area of the parallelogram unchanged and increase the height to 4 times of the original, the bottom should be ()
18. Tell the parallelogram area how to find the bottom and height
19. The volume of a cone is certain. The area of the bottom of a cone is not proportional to its height. Why? The length of the road is fixed every day. The length of the road is not proportional to the number of days. Why? Come back!
20. If the volume of a cone is constant, the area of its bottom is inversely proportional to its height______ ．