Triangles Finding Missing Angles

Front

What is a triangle?

Back

A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry.

Tags

CCSS.2.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 a right angle?

Back

A right angle is an angle that measures exactly 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

How do you find a missing angle in a triangle?

Back

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

Tags

CCSS.8.G.A.5

Front

What does it mean for triangles to be similar?

Back

Triangles are similar if they have the same shape but not necessarily the same size. This means their corresponding angles are equal.

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Front

If two angles of a triangle are known, how can you find the third angle?

Back

You can find the third angle by subtracting the sum of the two known angles from 180 degrees.

Tags

CCSS.8.G.A.5

Front

What is the relationship between the angles in similar triangles?

Back

In similar triangles, corresponding angles are equal, and the ratios of the lengths of corresponding sides are proportional.

Tags

CCSS.HSG.SRT.A.2

Front

What is the measure of the missing angle if one angle is 50 degrees and another is 60 degrees?

Back

The missing angle is 70 degrees (180 - 50 - 60 = 70).

Tags

CCSS.7.G.B.5