Exercise 8 Page 334

To find the area, calculate half of the product of the base and the height.

80km^2

Practice makes perfect

Let's find the area of the given triangle. The area of a triangle is half the product of its base and its height.

Let's rotate the figure to make it easier to identify the base and the height!

After rotating the triangle, we can see that the length of the base is 10 kilometers, and the height is 16 kilometers. Let's substitute these two values into the formula for the area of a triangle and simplify.

A=1/2bh

SubstituteII

b= 10, h= 16

A=1/2( 10)( 16)

▼

Evaluate right-hand side

Multiply

A=1/2(160)

MoveRightFacToNumOne

1/b* a = a/b

A=160/2

CalcQuot

Calculate quotient

A=80

The area of the triangle is 80 square kilometers.

Subchapter links

1 Areas of Parallelograms p.333

2 Areas of Triangles p.334

3 Areas of Trapezoids and Kites p.335

4 Three-Dimensional Figures p.336

5 Surface Areas of Prisms p.336

6 Surface Areas of Pyramids p.337

7 Volumes of Rectangular Prisms p.337

Exercise 8 Page 334

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