What is an angle?
Finding Missing Angles

Flashcard
•
Mathematics
•
4th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
An angle is formed by two rays (sides) that share a common endpoint (vertex). It is measured in degrees.
2.
FLASHCARD QUESTION
Front
What is a right angle?
Back
A right angle measures exactly 90 degrees.
3.
FLASHCARD QUESTION
Front
What is an acute angle?
Back
An acute angle measures less than 90 degrees.
4.
FLASHCARD QUESTION
Front
What is an obtuse angle?
Back
An obtuse angle measures more than 90 degrees but less than 180 degrees.
5.
FLASHCARD QUESTION
Front
What is a straight angle?
Back
A straight angle measures exactly 180 degrees.
6.
FLASHCARD QUESTION
Front
How do you find a missing angle in a triangle?
Back
The sum of the angles in a triangle is always 180 degrees. To find a missing angle, subtract the sum of the known angles from 180.
7.
FLASHCARD QUESTION
Front
What is the measurement of the missing angle if two angles are 60 degrees and 50 degrees?
Back
The missing angle is 70 degrees (180 - (60 + 50)).
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