Eureka Math Grade 4 Module 4 End of Module Review

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

A circle has an infinite number of lines of symmetry.

The sum of angles in a triangle is always 180 degrees.

An equilateral triangle is a triangle where all three sides are of equal length and all three angles are equal (each measuring 60 degrees).

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

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

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

Parallel lines are lines that run in the same direction and will never cross each other.

The center of a circle is the point that is equidistant from all points on the circle.

A scalene triangle is a triangle where all three sides are of different lengths and all three angles are different.