1. 9.2 Geometry pg. 521 Finding the area.

2. 160.4 m 40 m 36m 27 m 9 m Find the area of the large rectangle minus the area of the small rectangle. 40 x 36 – 27 x 9 35. A lot is 40 m by 36 m. A house 27 m by 9 m is built on the lot. How much area is left for a lawn? 1440 - 243 1197 m 2 L x W – L x W

3. 40. A standard sheet of typewriter paper is 8 ½ in. by 11. We generally type on a 7 ½ in. by 9 in. area of paper. What is the area of the margin? 8 1/2 11 7 1/2 9 Find the area of the larger rectangle minus the area of the smaller rectangle. 8.5 x 11 – 7.5 x 9 93.5 – 67.5 26 in 2 L x W – L x W

4. 43. Find the area of the shaded region. 4 cm S 2 x 5 Find the area of the squares. 4 2 x 5 16 x 5 80 cm 2

5. 11 mm 12.5 mm 2 mm 3 mm 5 mm 44. Find the area of the shaded region. Find the area of the larger rectangle minus the area of the smaller rectangle. 12.5 x 11 – 5 x 6 6 11 -5 6 137.5 - 30 107.5 mm 2 L x W – L x W 137.5 - 30.0 107.5

6. 30 cm 45. Find the area of the shaded region. Find the area of the square minus the area of the triangle. S 2 – ½ BH 30 x 30 – ½ (30) (15 ) 900 – (15) (15) 900 - 225 675 cm 2 30 cm 15 cm

7. 46. Find the area of the shaded region. 12 in. 2 in. 6 in. 4 in. 3 in. 2 in. Area of the rectangle minus area of small triangle minus area of large triangle. L x W – ½ BH – ½ BH 12 x 6 – ½ (3) (2) – ½ (4) (4) 72 – (3) (1) – (2) (4) 72 – 3 - 8 61 in 2 2 4 4 12 in.

8. Try numbers 48 and 50.