Journal Prompt

• On a separate piece of paper:– With only two units left of the semester, how do

you feel about Geometry?• What was your favorite topic?• What was your least favorite?

– How do you feel about your current grade?• What are you going to do to keep it up?• What are you going to do to bring your grade up?

• Turn in to Mr. K

Unit 9 Essential Questions

• How do areas of similar polygons compare?

• How are the areas of polygons and circles related and applied?

Unit 9 Bonus Question• A farmer has a goat and he is trying to decide where to allow him to

graze.

• Option 1: He can be tethered to the side of a square 10ft by 10ft shed. The tethering rope is 18 feet long and tied to a post in the middle of one of the sides.

• Option 2: A 14 feet by 17 feet rectangular fenced in area. He has a rhombus shaped shed in the middle of the fence that has a diagonal length of 4 feet and 3 feet that the goat will not be allowed to enter.

• Which option should the farmer choose so the goat will have more area to graze? Provide mathematical reasoning behind your answer.

Today’s Objective

• Students will be able to find the perimeter, area, and circumference of polygons

Definitions

Perimeter: The distance around a figure (sum of all sides)

Area: The amount of square units inside a figure

Circumference: The distance around a circle

Area of a Rectangle

h

b

Area of a Square

s

s

Area of a Triangle

b

Area of a Circle

r

Circumference of a Circle

r

Ex. 1 Find area and perimeter

7 cm

4 cm

Ex. 2 Find the area and Circumference

14 cm

Ex 4 Find the area of the shaded region

Ex. 5 Find the area

Ex 6 Find the area

Ex 7 Find the area

Ex 8 Find the Area

Classwork

• Complete Evens from page 2 of packet

• Get checked off by Mr. K when finished

Homework

• Do Odds from Page 2 of packet