# Chapter 10 Section 1

### Connor N.

## Areas of Parallelograms and Trapezoids

-The perpendicular distance between the base and opposite side is the height of a parallelogram

-Base of a trapezoid are its two parallel sides

-The perpendicular distance between the base is the height of a trapezoid

The area of the parallelogram is (b1+b2)h, so the area of each trapezoid is 1/2(b1+b2)h

## Formula for Parallelogram

**A=b*h**

## Section 2

## How to find the area to a circle and how a pizza is made

## Formula for a circle

## Ch 10 Section 3

## Three Dimensional Figures

-Polyhedron, is a solid that is enclosed by polygons

-Face, the polygons that form a polyhedron is called face

-Prism, is a polyhedron that has 2 congruent bases that lie on parallel planes

## Ch 10 sec 4

## Key Vocabulary

**is a two dimensional pattern that forms a solid when it is folded**

__net__-The ** surface area** of a polyhedron is the sum of the areas of its faces to find the surface area of a triangular prism find the sum of the areas of the two triangular faces and the three rectangular faces

## Ch 10 sec 5

## Examples

## Finding area of a cone

## Ch 10 Sec 6

## Examples

__PRISMS__-triangular prism

-rectangular prism

-pyramid

__CYLINDERS__

-cone

-cylinder

## Finding volume of a cylinder

=pi r2 h

=pi (3)2(9)

=81pi

=254.469

## Ch 10 Sec 7

## Volume of a pyramid

The volume of a pyramid is one third the product of the area of the area of the base and the height