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 the measure of the third angle if two angles of a triangle are 50° and 60°?

Back

The third angle measures 70° (180° - 50° - 60° = 70°).

Tags

CCSS.8.G.A.5

Front

What is the relationship between the angles in an isosceles triangle?

Back

In an isosceles triangle, the angles opposite the equal sides are equal.

Tags

CCSS.HSG.CO.C.11

Front

If two angles of a triangle are 45° each, what is the type of triangle?

Back

It is an isosceles triangle.

Tags

CCSS.4.G.A.2

Front

What is the measure of an exterior angle of a triangle?

Back

The measure of an exterior angle is equal to the sum of the two opposite interior angles.

Tags

CCSS.8.G.A.5

Front

If the angles of a triangle are in the ratio 2:3:4, what are the measures of the angles?

Back

The angles measure 40°, 60°, and 80°.

Tags

CCSS.8.G.A.5

Front

What is the formula to find the missing angle in a triangle?

Back

The formula is: Missing angle = 180° - (sum of the other two angles).

Tags

CCSS.8.G.A.5

Front

What is the definition of complementary angles?

Back

Complementary angles are two angles whose sum is 90°.

Tags

CCSS.7.G.B.5

Front

What is the definition of supplementary angles?

Back

Supplementary angles are two angles whose sum is 180°.

Tags

CCSS.7.G.B.5