Angles and Triangle Properties Flashcard

Front

What is a right angle?

Back

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

Front

What type of triangle has all three angles measuring 60 degrees?

Back

An equilateral triangle has all three angles measuring 60 degrees.

Front

What type of triangle has two equal angles and one angle measuring 90 degrees?

Back

An isosceles triangle has two equal angles and one angle measuring 90 degrees.

Front

How do you calculate the exterior angle of a triangle?

Back

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

Front

What type of triangle has all angles measuring less than 90 degrees?

Back

An acute triangle has all angles measuring less than 90 degrees.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

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

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle with all sides of different lengths and all angles of different measures.

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.

Front

If a triangle has angles measuring 80 degrees, 70 degrees, and 30 degrees, what type of triangle is it?

Back

It is an acute triangle.