What is an equilateral triangle?
#5.4 Equilateral and Isosceles Triangles

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•
Mathematics
•
9th - 11th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A triangle with all three sides of equal length and all three angles measuring 60 degrees.
2.
FLASHCARD QUESTION
Front
What is an isosceles triangle?
Back
A triangle with at least two sides of equal length and the angles opposite those sides are equal.
3.
FLASHCARD QUESTION
Front
What is the sum of the interior angles of a triangle?
Back
180 degrees.
4.
FLASHCARD QUESTION
Front
If two angles of a triangle are equal, what type of triangle is it?
Back
Isosceles triangle.
5.
FLASHCARD QUESTION
Front
What is the formula for finding the area of a triangle?
Back
Area = 1/2 * base * height.
6.
FLASHCARD QUESTION
Front
In an isosceles triangle, if the equal sides are 10 cm each and the base is 8 cm, what is the height?
Back
Height = √(10² - (8/2)²) = √(100 - 16) = √84 ≈ 9.17 cm.
7.
FLASHCARD QUESTION
Front
What is the relationship between the angles in an equilateral triangle?
Back
All angles are equal and each measures 60 degrees.
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