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**Example 1: Finding the Area of a Triangle**

A. Find the area of the triangle. 5 8 The area of the triangle is 20 square units.

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**Example 2: Finding the Area of a Triangle**

B. Find the area of the triangle. 9 12 The area of the triangle is 54 square units.

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Check It Out! Example 3 A. Find the area of the triangle. 9 6 The area of the triangle is 27 square units.

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Check It Out! Example 4 B. Find the area of the triangle. 10 7 The area of the triangle is 35 square units.

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**The two parallel sides of a trapezoid are its bases, b1 and b2**

The two parallel sides of a trapezoid are its bases, b1 and b2. The height of a trapezoid is the perpendicular distance between the bases. b2 h b1

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**In the term b1, the number 1 is called a subscript**

In the term b1, the number 1 is called a subscript. It is read as “b-one” or “b sub-one.” Reading Math

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**Example 5: Finding the Area of a Trapezoid**

A. Find the area of the trapezoid. 5 in. 6 in. 9 in. The area of the trapezoid is 42 in2.

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**Example 6: Finding the Area of a Trapezoid**

B. Find the area of the trapezoid. 12 cm 7 cm 16 cm The area of the trapezoid is 98 cm2.

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**A. Find the area of the trapezoid.**

Check It Out! Example 7 A. Find the area of the trapezoid. 11 in. 4 in. 6 in. The area of the trapezoid is 45 in2.

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**B. Find the area of the trapezoid.**

Check It Out! Example 8 B. Find the area of the trapezoid. 16 cm 9 cm 5 cm The area of the trapezoid is 94.5 cm2.

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**Example 9: Geometry Application**

The state of Wisconsin is shaped somewhat like a trapezoid. What is the approximate area of the state? The area of Wisconsin is approximately 56,000 square miles.

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