Triangle classification and missing angles

Front

Define Obtuse Angle

Back

Greater than 90 and less than 180.

Front

What type of angle is greater than 90 degrees?

Back

Obtuse.

Front

Define Acute Angle

Back

Less than 90.

Front

What type of triangle has one right angle?

Back

Right triangle.

Front

What type of triangle has all sides of different lengths?

Back

Scalene triangle.

Front

What type of triangle has two sides of equal length?

Back

Isosceles triangle.

Front

What is the sum of the angles in any triangle?

Back

180 degrees.

Front

If one angle in a triangle is 90 degrees, what is the other angle type?

Back

Acute or obtuse.

Front

Name a triangle with all angles less than 90 degrees.

Back

Acute triangle.

Front

What is a right angle?

Back

Exactly 90 degrees.