Interior Angles of Triangles

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°.

Tags

CCSS.8.G.A.5

Front

If one angle of a triangle is 90°, what type of triangle is it?

Back

It is a right triangle.

Tags

CCSS.4.G.A.2

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90°.

Tags

CCSS.4.G.A.1

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90° but less than 180°.

Tags

CCSS.4.G.A.1

Front

How do you find the measure of a missing angle in a triangle?

Back

Subtract the sum of the known angles from 180°.

Tags

CCSS.8.G.A.5

Front

Can a triangle have two obtuse angles?

Back

No, a triangle cannot have two obtuse angles because the sum of the angles would exceed 180°.

Tags

CCSS.8.G.A.5

Front

What are the three types of triangles based on their angles?

Back

The three types are acute triangle, right triangle, and obtuse triangle.

Tags

CCSS.4.G.A.2

Front

What is the definition of a scalene triangle?

Back

A scalene triangle is a triangle with all sides of different lengths.

Tags

CCSS.4.G.A.2

Front

What is the definition of an isosceles triangle?

Back

An isosceles triangle is a triangle with at least two sides of equal length.

Tags

CCSS.4.G.A.2

Front

What is the definition of an equilateral triangle?

Back

An equilateral triangle is a triangle with all three sides of equal length.

Tags

CCSS.4.G.A.2