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Three sided shape
triangle (triangular)

a four sided shape
square (rectangular)

five sided shape
Pentagon (Pentagonal)

6 sided shape
Hexagon (hexagonal)

7 sided shape
heptagon (heptagonal)

8 sided shape
octagon (octagonal)

9 sided shape
nonagon (nonagonal)

10 sided shape
dodecagon (dodecagonal)

finding area of a circle
(R)^{2 }x π for FULL circle

find area of triangle
height x base = answer ÷ 2

Prism
A 3D shape with 2 bases and the rest rectangles

A quadrilateral
A quadrilateral is a foursided polygon with four angles.

Regular prism
has regular polygons as bases

Regular Pyramid
has a regular polygon as its base. its other sides (faces) and triangles

_______Hedron
any 3D shape


