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?

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Presentation transcript:

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

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