# Chapter 10 - Radical Expressions and Equations - 10-6 Trigonometric Ratios - Lesson Check: 1

4/5

#### Work Step by Step

Recall, for a right triangle, sin A equals the length of the side opposite to angle A divided by the length of the hypotenuse of the triangle. When we do this for the triangle in the problem, we find that sin A equals 8/10, which reduces to ⅘.

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