Interior and Exterior Angles of Triangles

Front

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

Back

180 degrees

Front

What do you call an angle that is less than 90 degrees?

Back

Acute angle

Front

What is the measure of an angle that is exactly 90 degrees?

Back

Right angle

Front

What do you call an angle that is greater than 90 degrees but less than 180 degrees?

Back

Obtuse angle

Front

What is the measure of a straight angle?

Back

180 degrees

Front

If one angle of a triangle is 60 degrees and another is 75 degrees, what is the measure of the third angle?

Back

45 degrees

Front

In a triangle, if one angle measures 93 degrees, what is the sum of the other two angles?

Back

87 degrees

Front

If a triangle has angles measuring 29 degrees and 39 degrees, what is the measure of the third angle?

Back

112 degrees

Front

What is the relationship between the exterior angle and the two opposite interior angles in a triangle?

Back

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

Front

What is an exterior angle of a triangle?

Back

An angle formed by one side of the triangle and the extension of an adjacent side.