Question

In a ∆ABC, DE || BC. If 2DE = BC and area of ∆ABC = 81 cm2 , find the area of ∆ADE​

Answer 1

Answer:

40.5 cm. sq.

Step-by-step explanation:

Given: In a ∆ABC, DE || BC. If 2DE = BC and area of ∆ABC = 81 cm sq

To find: Area of ∆ADE

Solution: Area of traingle = 1/2×base×height

Suppose the height of traingle is 9cm and base is 8 cm

So, 1/2×9×18=81 cm sq

So if we take half of base (As it is told BC=2DE)

It becomes 1/2×9×9=40.5 cm sq

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