Download presentation

Presentation is loading. Please wait.

1
**Perimeter, Circumference, and Area**

Geometry Mrs. King Unit 1, Lesson 7

2
**Rectangles Think about this classroom. The floor is a rectangle.**

If we measured the perimeter, what would that look like? If we painted the floor, what geometry term are we measuring?

3
Definitions Perimeter: the sum of the lengths of the sides of a polygon Area: the number of square units a polygon encloses

4
Formulas

5
**Find the perimeter and area of each figure:**

6
Extension #1: Margaret’s garden is a square 12 ft on each side. Margaret wants a path 1 ft wide around the entire garden. What will the outside perimeter of the path be? Because the path is 1 ft wide, increase each side of the garden by 1 ft. s = = 14 P = 4s P = 4(14) = 56

7
**Extension #2: Find the area of the figure below.**

Step #1: Divide the figure into squares and rectangles: Step #2: Find each area. Then add the areas. AR = bh AR = (15)(5) AR = 75 AS = s2 AS = (5)2 AS = 25 A = A = 125

8
Formulas

9
Example: ⨀ G has a radius of 6.5 cm. Find the circumference of ⨀ G in terms of π. Then find the circumference to the nearest tenth. C = 2 π r C = 2 π (6.5) C = 13π C = ≈ 40.8

10
**Example: Find the area of ⨀ B in terms of π. A = π r 2 A = π (1.5)2**

11
**Homework Perimeter, Circumference, and Area in Student Practice Packet**

(Page 8, #1-16)

Similar presentations

© 2022 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google