Exterior Angles & Angle Sum: Triangle
Flashcard
•
Mathematics
•
10th - 11th Grade
•
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 one interior angle of a triangle is 60 degrees and another is 70 degrees, what is the measure of the exterior angle adjacent to the 70-degree angle?
Back
The exterior angle is 60 + 70 = 130 degrees.
Tags
CCSS.8.G.A.5
4.
FLASHCARD QUESTION
Front
What is the sum of the interior angles of a triangle?
Back
The sum of the interior angles of a triangle is always 180 degrees.
Tags
CCSS.8.G.A.5
5.
FLASHCARD QUESTION
Front
If the interior angles of a triangle are 50 degrees and 60 degrees, what is the measure of the third angle?
Back
The third angle is 180 - (50 + 60) = 70 degrees.
Tags
CCSS.8.G.A.5
6.
FLASHCARD QUESTION
Front
How do you find the measure of an unknown angle in a triangle?
Back
To find an unknown angle in a triangle, subtract the sum of the known angles from 180 degrees.
Tags
CCSS.8.G.A.5
7.
FLASHCARD QUESTION
Front
What is the relationship between the exterior angle and the interior angles of a triangle?
Back
The exterior angle is equal to the sum of the two opposite interior angles.
Tags
CCSS.8.G.A.5
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