What is a straight angle?
Geometry Vocabulary

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Mathematics
•
10th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
An angle that measures exactly 180 degrees.
2.
FLASHCARD QUESTION
Front
What are supplementary angles?
Back
Two angles that add up to 180 degrees.
3.
FLASHCARD QUESTION
Front
What are complementary angles?
Back
Two angles that add up to 90 degrees.
4.
FLASHCARD QUESTION
Front
What is a ray?
Back
A ray is a line that starts at a point and extends infinitely in one direction.
5.
FLASHCARD QUESTION
Front
What are collinear points?
Back
Points that lie on the same straight line.
6.
FLASHCARD QUESTION
Front
What is an acute angle?
Back
An angle that measures less than 90 degrees.
7.
FLASHCARD QUESTION
Front
What is an obtuse angle?
Back
An angle that measures more than 90 degrees but less than 180 degrees.
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