Shapes 3rd Grade

triangle

3 sided polygon

pentagon

5 sided polygon

hexagon

6 sided polygon

octagon

8 sided polygon

polygon

A closed figure formed by three or more line segments

rhombus

A parallelogram with 4 congruent sides.

quadrillateral

A polygon with 4 sides

regular polygon

A polygon with equal angles and equal sides.

square

A quadrilateral with 4 equal sides and 4 right angles

trapezoid

A quadrilateral with exactly one (only one) pair of parallel sides

vertex

One corner of a polygon

Irregular Polygon

Sides and angles are all different

parallelogram

a quadrilateral whose opposite sides are parallel and equal

Rectangle

a quadrilateral with four right angles; opposite sides are equal

Perimeter

the distance around a polygon

Side

the line segments that make the shape

Area

the space inside a shape