Practice - Exterior Angle Theorem
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Practice Questions
Test your understanding with targeted questions
What is the exterior angle at vertex A if the interior angles ∠B = 45° and ∠C = 55°?
💡 Hint: Use the sum of the two opposite interior angles.
If one interior angle of a triangle is 30°, what can be one possible measure of the exterior angle?
💡 Hint: Use the relationship between interior angles and the straight angle.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What does the Exterior Angle Theorem state?
💡 Hint: Recall the relationship between exterior and interior angles.
If ∠A = 30° and ∠B = 70°, what is the exterior angle at C?
💡 Hint: Add the measures of ∠A and ∠B together.
3 more questions available
Challenge Problems
Push your limits with advanced challenges
In triangle PQR, if ∠P = 45° and ∠Q = 85°, what is the measure of the exterior angle at vertex R?
💡 Hint: Add the measures of ∠P and ∠Q.
Using the Exterior Angle Theorem, demonstrate how to prove triangle similarity when one triangle has two angles equal to another's angles.
💡 Hint: Think about using the corresponding angles.
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Reference links
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