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ISEE Lower Level
Mathematics Achievement

Angle Measurement in Triangle AC

Very Hard Geometry Angles

In triangle ABC, the measures of angle A, angle B, and angle C are related through an equation. If angle A is represented as 2x + 10 degrees, angle B is 3x degrees, and angle C is represented as 4x - 20 degrees, determine the value of x and consequently the measure of angle C.

Recall that the sum of the interior angles of a triangle equals 180 degrees.

Hint

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