Triangles Flashcard #1

Front

What is the measure of x in a triangle if one angle is 61 degrees and another is 59 degrees?

Back

The measure of x is 61 degrees.

Front

What do we call angles that have the same measure?

Back

Congruent angles.

Front

What type of angle measures exactly 90 degrees?

Back

Right angle.

Front

What is the measure of the missing angle in a triangle if the other two angles are 61 degrees and 39 degrees?

Back

The measure of the missing angle is 39 degrees.

Front

What triangle has a right angle (90 degrees)?

Back

Right Triangle.

Front

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

Back

180 degrees.

Front

What do we call a triangle with all sides of different lengths?

Back

Scalene triangle.

Front

What is an acute angle?

Back

An angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

An angle that measures more than 90 degrees but less than 180 degrees.

Front

What is the definition of a right triangle?

Back

A triangle that has one angle measuring 90 degrees.