What is the sum of the interior angles of a triangle?
Interior and Exterior Angles of Triangles

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Mathematics
•
7th - 10th Grade
•
Easy
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1.
FLASHCARD QUESTION
Front
Back
The sum of the interior angles of a triangle is always 180 degrees.
2.
FLASHCARD QUESTION
Front
Define an interior angle of a triangle.
Back
An interior angle of a triangle is formed by two sides of the triangle and is located inside the triangle.
3.
FLASHCARD QUESTION
Front
Define 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.
4.
FLASHCARD QUESTION
Front
What is the relationship between an exterior angle and the two opposite interior angles?
Back
The exterior angle is equal to the sum of the two opposite interior angles.
5.
FLASHCARD QUESTION
Front
If one interior angle of a triangle is 70 degrees, what is the sum of the other two angles?
Back
The sum of the other two angles is 110 degrees (180 - 70 = 110).
6.
FLASHCARD QUESTION
Front
Solve for x: x + 34 = 90.
Back
x = 56.
7.
FLASHCARD QUESTION
Front
If a triangle has angles measuring 40 degrees and 60 degrees, what is the measure of the third angle?
Back
The third angle measures 80 degrees (180 - 40 - 60 = 80).
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