Question

i have a doubt in them

Answer 1

Answer:

Here goes the solution!

1) Base = 15cm

Area of triangle= 87cm^2

Height = ?

Area of triangle = 1/2 × base × height

87 = 1/2 × 15 × height

87×2/15 = height

height = 11.6 cm

Similarly, you can do the rest two also.