Question

Если AC= 28 м, BD= 32 м, AD= 40 м, то BC= м? a-----b----------------------c-----------d-------

Answer 1

Ответ:

АD=AC+CD

CD=AD-AC

40-28=12

BC=BD-CD

32-12=20

Объяснение:

Answer 2

To find the length of BC, we can use the fact that in a trapezoid, the diagonals divide each other proportionally. This means that the ratio of the lengths of the segments formed by the diagonals is equal. In this case, we can use the ratio of AD to BC.

Let's assign the points as follows: a-----b----------------------c-----------d A B C D

Given: AC = 28 m BD = 32 m AD = 40 m

We need to find BC.

Using the proportionality of the diagonals, we have: AD/BC = AC/BD

Substituting the given values, we get: 40/BC = 28/32

Cross-multiplying: 28 * BC = 40 * 32

Simplifying: 28 * BC = 1280

Dividing both sides by 28: BC = 1280/28

Calculating: BC ≈ 45.714 m

Therefore, BC is approximately 45.714 meters.