Exterior Angles in Triangles
Flashcard
•
Mathematics
•
7th - 8th Grade
•
Practice Problem
•
Hard
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
What is an exterior angle of a triangle?
Back
An exterior angle of a triangle is formed by one side of the triangle and the extension of an adjacent side. It is equal to the sum of the two opposite interior angles.
Tags
CCSS.8.G.A.5
2.
FLASHCARD QUESTION
Front
State the Exterior Angle Theorem.
Back
The Exterior Angle Theorem states that the measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles.
Tags
CCSS.8.G.A.5
3.
FLASHCARD QUESTION
Front
If angle A = 50° and angle B = 60°, what is the measure of the exterior angle at vertex C?
Back
The exterior angle at vertex C is 110° (50° + 60°).
Tags
CCSS.8.G.A.5
4.
FLASHCARD QUESTION
Front
How do you find the measure of an unknown angle using the Exterior Angle Theorem?
Back
To find an unknown angle, add the measures of the two non-adjacent interior angles.
Tags
CCSS.8.G.A.5
5.
FLASHCARD QUESTION
Front
What is the relationship between an exterior angle and its adjacent interior angle?
Back
The exterior angle is supplementary to its adjacent interior angle, meaning they add up to 180°.
Tags
CCSS.8.G.A.5
6.
FLASHCARD QUESTION
Front
If the exterior angle is 145°, what is the measure of the adjacent interior angle?
Back
The adjacent interior angle is 35° (180° - 145°).
Tags
CCSS.8.G.A.5
7.
FLASHCARD QUESTION
Front
In triangle ABC, if angle A = 70° and angle B = 40°, what is the measure of angle C?
Back
Angle C is 70° (180° - 70° - 40°).
Tags
CCSS.8.G.A.5
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