Missing Angles in 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 degrees.

Tags

CCSS.8.G.A.5

Front

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

Back

It is a right triangle.

Tags

CCSS.4.G.A.2

Front

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

Back

Subtract the sum of the known angles from 180 degrees.

Tags

CCSS.8.G.A.5

Front

What is the measure of the third angle if two angles are 30 degrees and 70 degrees?

Back

The third angle measures 80 degrees.

Tags

CCSS.8.G.A.5

Front

What is the relationship between the angles in a triangle?

Back

The angles in a triangle are complementary, meaning they add up to 180 degrees.

Tags

CCSS.8.G.A.5

Front

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

Back

It is an isosceles 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 degrees.

Tags

CCSS.4.G.A.1

Front

What is an obtuse angle?

Back

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

Tags

CCSS.4.G.A.1

Front

What is the formula to find the missing angle x in a triangle if the other two angles are known?

Back

x = 180 - (angle1 + angle2).

Tags

CCSS.8.G.A.5

Front

If one angle of a triangle is 60 degrees and another is 50 degrees, what is the measure of the third angle?

Back

The third angle measures 70 degrees.

Tags

CCSS.8.G.A.5