4th Grade Geometry Vocabulary

Front

Congruent

Back

Same size , same shape

Front

Protractor

Back

Tool used to measure angles

Front

Degrees in a circle

Back

360 degrees

Front

Parallel lines

Back

2 lines that will never cross

Front

Isosceles Triangle

Back

A triangle that has 2 equal sides and one side that has a different length

Front

Obtuse angle

Back

An angle that measures more than 90 degrees and less that 180 degrees

Front

Line of symmetry

Back

a way to draw a line that cuts a shape in half exactly

Front

Line

Back

straight line that continues in both directions without endpoints

Front

Straight angle

Back

180 degrees, straight line

Front

Vertex

Back

a place where to rays meet to form an angle