Angles and Triangles

Front

A triangle that has all equal sides is a...

Back

equilateral triangle

Front

This is what kind of angle?

Back

acute

Front

How many acute angles must an acute triangle have?

Back

3

Front

What type of triangle is this?

Back

scalene

Front

What is a vertex?

Back

It is a corner or a point where lines meet.

Front

What is an obtuse angle?

Back

An angle greater than 90 degrees but less than 180 degrees.

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.

Front

What is a straight angle?

Back

An angle that measures exactly 180 degrees.

Front

What is an isosceles triangle?

Back

A triangle that has at least two equal sides.

Front

What is a scalene triangle?

Back

A triangle that has all sides of different lengths.