Lesson 1 8 Perimeter Area and Circumference Part

Lesson 1. 8: Perimeter, Area, and Circumference Part 1

Perimeter and Circumference • Perimeter: Rectangle: Square: Triangle: • Circumference:

Practice • Find the perimeter of each basic polygon. 12 m 1) 2) 6 m 8 m 3) 4) 8 m 5 m 11 m 6 m 7 m

Practice • Find the perimeter of each irregular polygon. 12 m 8 m 7 m 4 m 5 m 2 m

Area • Square: Rectangle: Triangle: Circle:

Practice • Find the area of each basic polygon. 12 m 1) 2) 6 m 8 m 3) 4) 8 m 5 m 11 m 6 m 7 m

Practice • Find the area of each irregular polygon. 12 m 8 m 7 m 4 m 5 m 2 m

Application • A particular lawn is 40 ft long and 15 ft wide. An LX 3 mower can mow the lawn in 50 ft 2 every 10 minutes. An LX 4 mower can mow 60 ft 2 every 10 minutes. How much time mowing the lawn is saved by buying the LX 4 compared to the LX 3 model?

English Units • Yard: • Mile: • Foot: • Inch:

Practice • Convert each unit to yards. 50 mi 65 mi . 85 ft 4890 ft 15 in 300 yd

Practice • You are tiling a kitchen floor that is 6 ft wide by 8 yds long. How many square yards of tile do you need? • Note: A = l * w for rectangles.

Application – Posters • A 30 inch long and * 2 foot wide poster needs a 3 inch frame. What is the perimeter of the frame? • Note: Perimeter = 2 l + 2 w for rectangles.

Classwork • Lesson 1. 8, #1, 4, 6

Homework • 9/22: Lesson 1. 8, #7 – 13 odd, 19 – 33 odd Read Chapter Review • 9/24: p. 75, #3 – 19 Review Chapter 1