Question

Find the base of a triangle whose are is 90 cm² and height 12 cm.

Answer 1

Base of a triangle = $\frac{2\times \mathrm{Area}}{\mathrm{Height}}$
Here, height = 12 cm and area = 90 cm²

∴ Base = $\left(\frac{2\times 90}{12}\right)$ cm = 15 cm