Triangle Sum Theorem

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•
Mathematics
•
9th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What does the Triangle Sum Theorem state?
Back
The Triangle Sum Theorem states that the sum of the interior angles of a triangle is always 180 degrees.
2.
FLASHCARD QUESTION
Front
If one angle of a triangle measures 66°, what is the sum of the measures of the other two angles?
Back
The sum of the measures of the other two angles is 180° - 66° = 114°.
3.
FLASHCARD QUESTION
Front
How do you find the measure of an unknown angle in a triangle when the other two angles are known?
Back
To find the measure of an unknown angle, subtract the sum of the known angles from 180°.
4.
FLASHCARD QUESTION
Front
What is the measure of each angle in an equilateral triangle?
Back
In an equilateral triangle, each angle measures 60°.
5.
FLASHCARD QUESTION
Front
If two angles of a triangle are 25° and 30°, what is the measure of the third angle?
Back
The third angle measures 180° - (25° + 30°) = 125°.
6.
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°.
7.
FLASHCARD QUESTION
Front
How can you determine if a triangle is valid based on its angles?
Back
A triangle is valid if the sum of its three angles equals 180°.
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