Isosceles and Equilateral Triangles

Front

What do the angles in an equilateral triangle measure?

Back

60°, 60°, 60°

Tags

CCSS.8.G.A.5

Front

What is an isosceles triangle?

Back

A triangle with at least two equal sides and two equal angles.

Tags

CCSS.4.G.A.2

Front

What is the sum of the interior angles of a triangle?

Back

180°

Tags

CCSS.8.G.A.5

Front

If two angles of a triangle are equal, what type of triangle is it?

Back

Isosceles triangle.

Tags

CCSS.4.G.A.2

Front

What is the relationship between the sides and angles in an equilateral triangle?

Back

All sides are equal, and all angles measure 60°.

Tags

CCSS.HSG.CO.C.10

Front

How do you find the length of a side in an isosceles triangle if you know the base and the height?

Back

Use the Pythagorean theorem.

Tags

CCSS.HSG.SRT.C.8

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height.

Tags

CCSS.6.G.A.1

Front

What is the measure of each angle in an equilateral triangle?

Back

60°.

Tags

CCSS.8.G.A.5

Front

If the length of one side of an equilateral triangle is 6, what is the perimeter?

Back

18 (6 + 6 + 6).

Tags

CCSS.3.MD.D.8

Front

What is the measure of the vertex angle in an isosceles triangle if the base angles are 40°?

Back

100°.

Tags

CCSS.8.G.A.5