Angles, Angle Relationships, Triangles

Front

What is an angle?

Back

An angle is formed by two rays (sides of the angle) that share a common endpoint (the vertex).

Tags

CCSS.4.G.A.1

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

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 a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Tags

CCSS.4.G.A.1

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Tags

CCSS.4.G.A.1

Front

If m∠1 = 30°, what is m∠3 if they are equal?

Back

m∠3 = 30°.

Tags

CCSS.7.G.B.5

Front

Find x if m∠x + 15° = 30°. What is x?

Back

x = 15°.

Tags

CCSS.7.G.B.5

Front

Which set of angles can form a triangle? 90°, 90°, 90° or 40°, 50°, 60°?

Back

40°, 50°, 60° can form a triangle.

Tags

CCSS.7.G.A.2

Front

What is the measure of the missing angle if the other two angles are 70° and 60°?

Back

The missing angle is 50°.

Tags

CCSS.8.G.A.5