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 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

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

Back

To find the missing angle, subtract the sum of the known angles from 180 degrees.

Tags

CCSS.8.G.A.5

Front

In a triangle, if two angles are known to be 30 degrees and 60 degrees, what is the measure of the third angle?

Back

The third angle measures 90 degrees.

Tags

CCSS.8.G.A.5

Front

What is an exterior angle of a triangle?

Back

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, how do you find the angles?

Back

Let the angles be 2x, 3x, and 4x. Then, 2x + 3x + 4x = 180 degrees. Solve for x.

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

How do you calculate the measure of an angle if you know the other two angles in a triangle?

Back

Subtract the sum of the known angles from 180 degrees.

Tags

CCSS.8.G.A.5

Front

What is the value of x if the angles of a triangle are 45 degrees, x degrees, and 90 degrees?

Back

x = 45 degrees.

Tags

CCSS.8.G.A.5

Front

What is the definition of a scalene triangle?

Back

A scalene triangle is a triangle with all sides and angles of different measures.

Tags

CCSS.4.G.A.2