
(Honors) Triangle Angle Sum, Ext Angle Thm, Isos & Equil Trian
Flashcard
•
Mathematics
•
9th - 12th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the Triangle Angle Sum Theorem?
Back
The Triangle Angle Sum Theorem states that the sum of the interior angles of a triangle is always 180°.
2.
FLASHCARD QUESTION
Front
What is 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. The measure of an exterior angle is equal to the sum of the measures of the two opposite interior angles.
3.
FLASHCARD QUESTION
Front
What is an isosceles triangle?
Back
An isosceles triangle is a triangle that has at least two sides of equal length, which also means that the angles opposite those sides are equal.
4.
FLASHCARD QUESTION
Front
What is an equilateral triangle?
Back
An equilateral triangle is a triangle in which all three sides are of equal length and all three interior angles are equal, each measuring 60°.
5.
FLASHCARD QUESTION
Front
How do you find the measure of a missing angle in a triangle?
Back
To find the measure of a missing angle in a triangle, subtract the sum of the known angles from 180°.
6.
FLASHCARD QUESTION
Front
If two angles of a triangle are 40° and 50°, what is the measure of the third angle?
Back
The third angle measures 90° (180° - 40° - 50° = 90°).
7.
FLASHCARD QUESTION
Front
What is the relationship between the base angles and the vertex angle in an isosceles triangle?
Back
In an isosceles triangle, the base angles are equal, and the vertex angle is determined by the measure of the base angles.
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