Basic Polygons & Circles

Geometry

Number of sides determines name

Triangles

3 SIDES

Isosceles- 2 equal sides

Equilateral- all sides equal

Scalene- no sides are equal

Quadrilaterals

4 SIDES

RECTANGLE

TRAPEZOID

PARALLELOGRAM

SQUARE

Pentagons

5 SIDES

Octagons

8 SIDES

Circles

0 SIDES

Radius- A line segment that joins the center of a circle with any point on its surface.

Diameter- a straight segment that passes through the center of the circle with endpoints on the circle