Question

the area of a triangle is 90cm2. If its base is 15 cm, find its altitude.

Answer 1

area of triangle= 1/2×15×h =90
15/2h
h=90×2/15
=12cm

Answer 2

here is your answer ✔ ✔ ✔ ✔

$area \: of \: a \: triangle \: = {90cm}^{2} \\ base \: of \: a \: triangle \: = 15cm \\ let \: its \: altitude \: be \: x$

area of a triangle = 1/2 x Base × height

90 = 1/2 × 15 × x

90 × 2 = 15x

180 /15 = x

12 = x

so the altitude is 12 cm