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Do Now

Do Now. 1. What is the perimeter of a square with side lengths of 15 in.? 2. What is the perimeter of a rectangle with length 16 cm and width 11 cm ? DWP #72. 60 in. 54 cm. Monday Math Madness. Erin go Bragh translates to…. Where was the first St. Patrick’s Day parade held?

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Do Now

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  1. Do Now 1. What is the perimeter of a square with side lengths of 15 in.? 2. What is the perimeter of a rectangle with length 16 cm and width 11 cm? DWP #72 60 in. 54 cm

  2. Monday Math Madness • Erin go Braghtranslates to…. • Where was the first St. Patrick’s Day parade held? • What U.S. city dyes the river green for the holiday?

  3. 9-1 A Area of Parallelograms & Rectangles

  4. Key Concept

  5. Example 1 Find the area of the parallelogram. The base is 3 units, and the height is 10 units. A = bh A = 3● 10 A = 30 The area is 30 square units or 30 units2.

  6. Example 2 Find the area of theparallelogram. A = bh A = 8● 5 A = 40 The area of the parallelogram is 40 square centimeters or 40 cm2.

  7. b● 7 21 ______ ____ = 7 7 Example 3 Find the base of the parallelogram. A = bh 21 = b● 7 3 = b The base is 3 centimeters.

  8. Example 4 José is building a dog run for his dog in a parallelogram-shaped space. Find the area of the space that the run will enclose. The dog pen is shaped like a parallelogram. So, use the formula A = bh.

  9. A = bh

  10. A =lw A = 15 •9 A = 135 The area is about 135 in2. Example 5 Find the area of the figure. 15 in. 9 in.

  11. A =lw A = 13 •7 A = 91 Example 6 Find the area of the figure. 13 in. 7 in. The area is about 91 in2.

  12. 221 – 18 = 203 The area of the kitchen to be tiled is 203 ft2. Example 7 Jessika is going to tile a kitchen that measures 13 ft by 17 ft. Some floor space is taken up by an island that measures 3 ft by 6 ft. How much area remains to be tiled in the kitchen? ˜– = floor area island kitchen area to be tiled – = (13 • 17) (3 • 6) n

  13. Your Turn

  14. 41.4 m2 48 ft2 160 in2 288 ft2 Find the area of each figure. 1. 2. 3. What is the area of a parallelogram with base 16 in. and height 10 in.? 4. A square fish pond that is 6 ft long is surrounded by a square walk that is 18 ft long. What is the area covered by the walk?

  15. Homework • Pg. 525 #1-32 Evens

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