Question

A rectangle has length of 8 cm and diagonal 10 cm .what is it’s perimeter

Answer 1

breadth= root under 10^2 -8^2

= root under 100-64

= root under 36 =6

length = 8cm

so.. perimeter = 2× (8+6)

= 2×14 =28cm

Answer 2

Given:

length=8cm

diagonal=10cm

d²=l²+b²

b²=d²-l²

b²=(10)²-(8)²

b=√100-64

b=√36

b=6cm

Perimeter=2(l+b)

=2(8+6)

=2×14=28cm