What is the Triangle Angle-sum Theorem?
Triangle Angle-sum and Exterior Angle Theorem Review

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Mathematics
•
10th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The Triangle Angle-sum Theorem states that the sum of the interior angles of a triangle is always 180 degrees.
2.
FLASHCARD QUESTION
Front
What is the Exterior Angle Theorem?
Back
The Exterior Angle Theorem states that the measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles.
3.
FLASHCARD QUESTION
Front
If one angle of a triangle measures 41°, what is the maximum possible measure of the other two angles?
Back
The maximum possible measure of the other two angles is 139° (since 180° - 41° = 139°).
4.
FLASHCARD QUESTION
Front
How do you find the measure of an unknown angle in a triangle when two angles are known?
Back
To find the measure of an unknown angle, subtract the sum of the known angles from 180°.
5.
FLASHCARD QUESTION
Front
What is the relationship between the angles in a right triangle?
Back
In a right triangle, one angle measures 90°, and the sum of the other two angles is 90°.
6.
FLASHCARD QUESTION
Front
If angle A = 36° and angle B = 54°, what is the measure of angle C in triangle ABC?
Back
Angle C = 180° - (36° + 54°) = 90°.
7.
FLASHCARD QUESTION
Front
What is the formula to calculate the measure of an exterior angle?
Back
The measure of an exterior angle is calculated as the sum of the two opposite interior angles.
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