Question

I need help with this

Answer 1

82

Explanation:

20.5 x 8 x 1/2

Answer 2

Area of a triangle is 1/2 x base x height:

Area = 1/2 x 8 x 20.5 = 82 square cm.

It is hone-half the area of a rectangle with dimensions 20.5 by 8 cm.