# Chapter 10 - Geometry - Chapter Summary, Review, and Test - Review Exercises - Page 682: 40

$50$ square centimeters

#### Work Step by Step

RECALL: The area $A$ of a triangle can be found using the formula $A= \frac{1}{2}bh$ where b = base and h = height. The given polygon is a triangle with a base of 20 cm and a height of 5 cm. Use the formula above to obtain: $A = \frac{1}{2}20(5) = 50$ square centimeters

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