Exercise 4 Page 619

We are asked to find the area of the given triangle. The area is half the product of its base and its height. The height is the altitude perpendicular to whichever side is being used as the base.

In the given triangle we can see that the base is 9 inches and that the height is 8 inches. We can substitute these two values into the formula for the area of a triangle and simplify.

A=1/2bh

SubstituteII

b= 9, h= 8

A=1/2(9)( 8)

▼

Simplify

MoveRightFacToNumOne

1/b* a = a/b

A=1/2(72)

CalcQuot

Calculate quotient

A=36

The area of the triangle is 36in.^2.