CBSE Class 10 Maths (Standard) 2019 · Paper 30(B) · Question 21(a)

Triangles 3 marks Medium

D

E

and

F

are respectively the mid-points of sides

A B

B C

and

C A

△ A B C

. Find the ratio of the areas of

△ D E F

and

△ A B C

Answer

\frac{ar ( △ D E F )}{ar ( △ A B C )} = \frac{1}{4}

, i.e.

1 : 4

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