Grade 3 Geometry Basics

Front

triangle

Back

3 sides, 3 angles

Front

Square

Back

4 equal sides, 4 right angles

Front

Rectangle

Back

Opposite sides equal, 4 right angles

Front

Circle

Back

Round shape, no sides

Front

Polygon

Back

Closed shape, straight sides

Front

Vertex

Back

Corner point of a shape

Front

Edge

Back

Line where two surfaces meet

Front

Angle

Back

Space between two intersecting lines

Front

Right Angle

Back

90 degrees

Front

Acute Angle

Back

Less than 90 degrees