Question

Which is the base and which is the height?

Answer 1

check the picture below.

notice, if we put the 90° angle at the bottom, one leg from it will be horizontally straight and the other will be vertically straight.

Answer 2

Area of a triangle: 1/2(base * height)

base = 12 cm, height = 9 cm

Plug 12 for b and 8 for h.

1/2(12 * 8) = 48

A = 48 cm²