Triangle Sum, Isosceles & Equilateral Practice
Flashcard
•
Mathematics
•
9th - 10th Grade
•
Practice Problem
•
Hard
+5
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the Triangle Sum Theorem?
Back
The Triangle Sum Theorem states that the sum of the interior angles of a triangle is always 180 degrees.
Tags
CCSS.8.G.A.5
2.
FLASHCARD QUESTION
Front
What are the properties of an isosceles triangle?
Back
An isosceles triangle has at least two sides that are equal in length, and the angles opposite those sides are also equal.
3.
FLASHCARD QUESTION
Front
What defines 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 degrees.
Tags
CCSS.4.G.A.2
4.
FLASHCARD QUESTION
Front
How do you find the measure of an unknown angle in a triangle?
Back
To find an unknown angle in a triangle, use the Triangle Sum Theorem: subtract the sum of the known angles from 180 degrees.
Tags
CCSS.8.G.A.5
5.
FLASHCARD QUESTION
Front
What is the formula for the perimeter of a triangle?
Back
The perimeter of a triangle is the sum of the lengths of all three sides: P = a + b + c.
Tags
CCSS.3.MD.D.8
6.
FLASHCARD QUESTION
Front
How do you classify triangles based on their angles?
Back
Triangles can be classified as acute (all angles < 90°), right (one angle = 90°), or obtuse (one angle > 90°).
Tags
CCSS.4.G.A.2
7.
FLASHCARD QUESTION
Front
What is the relationship between the angles in an isosceles triangle?
Back
In an isosceles triangle, the angles opposite the equal sides are also equal.
Tags
CCSS.8.G.A.5
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