Practice - The Exterior Angle Theorem
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Practice Questions
Test your understanding with targeted questions
What is the exterior angle if ∠CAB = 50° and ∠ABC = 30°?
💡 Hint: Add the two interior angles together.
If ∠CAB = 10° and ∠ACD = 70°, what is ∠ABC?
💡 Hint: Use the exterior angle theorem to find the missing angle.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does the Exterior Angle Theorem state?
💡 Hint: Think about how the exterior angle is formed and its relationship to the interior angles.
True or False: The sum of the interior angles of a triangle is always equal to the exterior angle.
💡 Hint: Consider the definitions of interior and exterior angles.
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Challenge Problems
Push your limits with advanced challenges
In a triangle, the exterior angle is 130°, and one of the interior angles is 40°. What is the measure of the other interior angle?
💡 Hint: Use the Exterior Angle Theorem.
Prove that in any triangle, the exterior angle is larger than either of the opposite interior angles.
💡 Hint: Consider the definitions and relationships of angles in a triangle.
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Reference links
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