# Measurement of angles

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1. In a certain triangle the measure of one angle is double the measure of a second angle but is 10 degrees less than the measure of the third angle. [The sum of the measures of three interior angles of a triangle is always 180 degrees.] Form an algebraic equation to express the problem and identify the variables, coefficients, and constants of the algebraic expression.

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#### Solution Preview

Suppose the measure of the first angle is x. It is double the measure of the second angle. So the measure of the second angle is x/2. It is 10 degrees less than the measure ...

#### Solution Summary

This shows how to form an algebraic equation to express a problem about triangle angles and identify the variables, coefficients, and constants of the algebraic expression.

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