Lines of Symmetry

Front

What is a line of symmetry?

Back

A line that divides a shape into two identical parts that are mirror images of each other.

Front

How many lines of symmetry does a square have?

Back

4 lines of symmetry.

Front

How many lines of symmetry does a rectangle have?

Back

2 lines of symmetry.

Front

How many lines of symmetry does a circle have?

Back

Infinite lines of symmetry.

Front

How many lines of symmetry does a triangle have?

Back

Depends on the type of triangle: Equilateral has 3, Isosceles has 1, Scalene has 0.

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 a right angle?

Back

An angle that forms a square corner and has a measure of 90 degrees.

Front

What is a reflex angle?

Back

An angle that measures more than 180 degrees but less than 360 degrees.

Front

How many lines of symmetry does a trapezoid have?

Back

0 lines of symmetry.