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Find the missing angles in triangles using the triangle angle sum property.

Worksheet with nine triangle diagrams, each showing two known angles and one missing angle labeled 'x', asking to find the missing angle using the triangle angle sum property.

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Show Answer Key & Explanations Step-by-step solution for: Angles in a Triangle Textbook Exercise - Corbettmaths

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(a) x = 40°
(b) x = 25°
(c) x = 50°
(d) x = 82°
(e) x = 137°
(f) x = 39°
(g) x = 63°
(h) x = 45°
(i) x = 9°

Parent Tip: Review the logic above to help your child master the concept of angles of triangles worksheet answers.

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