Question

*∆ABC and ∆ PQR are congruent. If length of side BC is 4 cm then which side of ∆PQR has the length 4 cm​

Answer 1

Answer:

Area of an equilateral triangle of side-length a is equal to:

4

3

a

2

Area of ΔABC=

4

3

4

2

=4

3

Let s be the side-length of the equilateral triangle with double the area, then:

4

3

s

2

=2×4

3

=8

3

⟹s

2

=32⟹s=

32

=

16×2

=4

2