Chapter 1 Section 1 7 Area and Perimeter

Chapter 1 Section 1. 7 Area and Perimeter

Warm-Up 1. Find the distance between (-2, 0) and (4, 2) 2. A and B are complementary angles. Find m A and m B if m A = 7 x+1 and m B = 4 x+1

Find the Perimeter and Area of Each Figure Rectangle: A = lw, P = 2 l + 2 w P = 2(13) + 2(7) = 26 + 14 = 40 units Area = 13(7) = 91 square units

Find the Perimeter and Area of Each Figure Square: A = s 2, P = 4 s P = 4(8) = 32 units Area = (8)2 = 64 square units

Find the Perimeter and Area of Each Figure Triangle: A = (½)bh, P = a + b + c P = 10 + 16 P = 36 units Area = (½)(16)(6) Area = 48 square units

Find the Perimeter and Area of Each Figure Circle: A = r 2, C = 2 r C = 2 (5) C = 10 units Area = (5)2 Area = 25 square units

Find the Perimeter and Area of Each Figure Square: A = s 2, P = 4 s P = 4(12) P = 48 units Area = (12)2 Area = 144 square units

Find the Perimeter and Area of Each Figure Triangle: A = (½)bh, P = a + b + c P = 24 + 10 + 26 P = 60 units Area = (½)(24)(10) Area = 120 square units

Find the Perimeter and Area of Each Figure Triangle: A = (½)bh, P = a + b + c P = 6. 5 + 10 + 2. 5 + 8 P = 27 units Area = (½)(10. 5)(6) Area = 31. 5 square units

Find the Perimeter and Area of Each Figure Circle: A = r 2, C = 2 r C = 2 (7) C = 14 units Area = (7)2 Area = 49 square units

Find the Perimeter and Area of Each Figure Rectangle: A = lw; P = 2 l + 2 w P = 2(2. 2) + 2(6. 4) P = 4. 4 + 12. 8 P = 17. 2 units Area = 2. 2(6. 4) Area = 14. 08 square units

Find the area of the figure described 10. Rectangle with length of 12. 3 centimeters and a width of 5 centimeters. • • A = lw A = 12. 3(5) = 61. 5 cm 2 11. Triangle with height 7 inches and base 14. 4 inches • • A = (½)bh A = (½)(14. 4)(7) = 50. 4 in 2 12. Circle with diameter 40 feet • • • r = 20 feet A = r 2 A = (20)2 = 400

Find the Area of the Figure s=6 Square: A = s 2 Area = (6)2 Area = 36 square units s=6

Find the Area of the Figure Circle: A = r 2 Area = (3)2 Area = 9 square units r=3

Find the Area of the Figure Triangle: A = (½)bh Area = (½)(6)(4) Area = 12 square units h=4 b=6