Angles in a Triangle
Flashcard
•
Mathematics
•
9th - 12th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the Triangle Sum Theorem?
Back
The Triangle Sum Theorem states that the sum of all angles in a triangle is 180°.
2.
FLASHCARD QUESTION
Front
What is an 'Acute' Angle?
Back
An angle that measures less than 90°.
3.
FLASHCARD QUESTION
Front
What is an 'Obtuse' Angle?
Back
An angle that measures more than 90° but less than 180°.
4.
FLASHCARD QUESTION
Front
What is a 'Right' Angle?
Back
An angle that measures exactly 90°.
5.
FLASHCARD QUESTION
Front
What is an 'Exterior Angle' of a triangle?
Back
An exterior angle is formed by one side of a triangle and the extension of an adjacent side.
6.
FLASHCARD QUESTION
Front
State the Exterior Angle Theorem.
Back
The Exterior Angle Theorem states that the measure of an exterior angle is equal to the sum of the measures of the two opposite interior angles.
7.
FLASHCARD QUESTION
Front
If angle A = 40° and angle B = 60°, what is angle C in triangle ABC?
Back
Angle C = 180° - (40° + 60°) = 80°.
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