What is an isosceles triangle?
Isosceles and Equilateral Triangles

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Mathematics
•
10th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
An isosceles triangle is a triangle that has at least two sides of equal length.
2.
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 angles are equal to 60 degrees.
3.
FLASHCARD QUESTION
Front
What is the sum of the interior angles of a triangle?
Back
The sum of the interior angles of a triangle is always 180 degrees.
4.
FLASHCARD QUESTION
Front
If two angles of a triangle are equal, what can be said about the triangle?
Back
The triangle is isosceles.
5.
FLASHCARD QUESTION
Front
In an isosceles triangle, how do you find the measure of the vertex angle if the base angles are known?
Back
The vertex angle can be found using the formula: Vertex Angle = 180 - 2(Base Angle).
6.
FLASHCARD QUESTION
Front
What is the relationship between the sides and angles in an equilateral triangle?
Back
In an equilateral triangle, all sides are equal, and all angles are equal to 60 degrees.
7.
FLASHCARD QUESTION
Front
How do you calculate the perimeter of an equilateral triangle?
Back
The perimeter of an equilateral triangle is calculated by multiplying the length of one side by 3: Perimeter = 3 × side length.
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