What is the sum of the interior angles of a triangle?
4.5.2 Angle Relationships in Triangles

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Mathematics
•
8th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The sum of the interior angles of a triangle is always 180°.
2.
FLASHCARD QUESTION
Front
What is an acute angle?
Back
An acute angle is an angle that measures less than 90°.
3.
FLASHCARD QUESTION
Front
What is a right angle?
Back
A right angle is an angle that measures exactly 90°.
4.
FLASHCARD QUESTION
Front
What is an obtuse angle?
Back
An obtuse angle is an angle that measures more than 90° but less than 180°.
5.
FLASHCARD QUESTION
Front
What is the relationship between the angles in a triangle?
Back
The angles in a triangle are related such that the sum of the angles equals 180°.
6.
FLASHCARD QUESTION
Front
If one angle of a triangle is 90°, what type of triangle is it?
Back
It is a right triangle.
7.
FLASHCARD QUESTION
Front
What is the exterior angle theorem?
Back
The exterior angle of a triangle is equal to the sum of the two opposite interior angles.
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