Finding Angle Measures in Triangles

Front

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

Back

The sum of the interior angles in a triangle is always 180°.

Tags

CCSS.8.G.A.5

Front

If one angle in a triangle measures 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

If two angles in a triangle measure 70° and 40°, what is the measure of the third angle?

Back

The third angle measures 70° (180° - 70° - 40° = 70°).

Tags

CCSS.8.G.A.5

Front

What is the definition of complementary angles?

Back

Complementary angles are two angles whose measures add up to 90°.

Tags

CCSS.7.G.B.5

Front

What is the definition of supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180°.

Tags

CCSS.7.G.B.5

Front

In a triangle, if one angle measures 66°, what is the maximum possible measure of the other two angles?

Back

The maximum possible measure of the other two angles is 114° (180° - 66° = 114°).

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