# Chapter 10

## "Code Letters"

h= height- The distance perpendicular between the bases

b= base- the length of the side a 2D polygon sits on

p= perimeter- the distance around a polygon

B= Base- the area of the face a 3D figure sits on

A= Area- The amount of space a 2D or 3D figure takes up

r= radius- the length perpendicular from the center of the circle to the outer edge

d= diameter- the distance straight from one side of a circle to the other going through the center point

C= Circumference- The distance around a circle

S= Surface area-how much "wrapping paper" you need

l= slant height- the height of a triangular face on a pyramid

## Area of a Circle

Area equals pi r squared

A=(pi)*(r*r)

## Area of a Square

Area equals base squared

A=b*b

## Area of a Triangle

Area equals half times base times height

A=1/2*b*h

## Area of a Rectangle

Area equals base times height

A=b*h

## Area of a Parallelogram

Area equals base times height

A=b*h

HOW TO FIND THE AREA OF A TRAPEZOID: THE EASY WAY!

## Section 10-2

How to find the Surface Area of a Rectangular Prism

## Surface Area of a Prism

Surface equals (two*base)*(perimeter*height)

S=2B*Ph

## Surface Area of a Cylinder

Surface equals (two times Base) plus (Circumference times height) equals two times pi times radius times radius plus two times radius times height

S=2B+Ch=2(pi)(r*r)+2(pi)rh

Cylinder Volume and Surface Area

## Vocab 10-3

Faces- Polygons that form polyhedrons

Edges- Segments where faces meet on a polyhedron

Vertex- A spot where three or more edges meet (plural: verticies)

## 10-4 Vocab

Net- 2D pattern that forms a solid when folded

Surface Area- Sum of all the areas of its faces

## Section 10-5

Surface Area of a Pyramid

## Surface Area of a Pyramid

Surface equals Base plus half times (four*S)*l

S=B=1/2(4S)l

S=(pi)r*r+(pi)rl

## Volume of a Prism

Volume equals Base times height

V=Bh

## Volume of a Cylinder

Volume equals Base times height

V=Bh

How to Find The Volume Of A Sphere: THE EASY WAY!
will you buy america for 3 goat

no no that is too much goat

fine 2 goat

yes i will buy america for 2 goat