Play with this applet to learn how to find the missing angle in the triangle. If you need help, scroll to the bottom of this page.

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Duane Habecker, Created with GeoGebra

Self-Check

Q1: What is the measure of the missing angle in this triangle?

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Q2: What is the measure of the missing angle in this triangle?

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Q3: What is the measure of the missing angle in this triangle?

[show answer]

HELP

Add the two given angles. Then subtract the sum from 180° to find the missing angle.