Thursday 3/5/15 ‘A’ Week.

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Presentation transcript:

Thursday 3/5/15 ‘A’ Week

Areas of Two Smaller Triangles: AREA = ½ x Base x Height Areas of Two Smaller Triangles: ½ x 5cm x 12cm AND ½ x 9cm x 12cm 2 2 30cm 54cm Area of One Triangle (complete): ½ x (5cm + 9cm) x 12cm 2 84cm A = ½ b h Area = ½ x Base x Height, so Area = Length x Width, so A = l w A = (28)(18) 2 A = 504 ft

Area: 1 x 2 = 2 2 x 1 = 2 2 x 2 = 4 2 x 1 = 2 1 x 2 = 2 2 x 2 = 4 Find the sum of all six areas. The Surface Area: 16 sq.units

Which sections have the same area? Surface Area: 12+9 = 21 sq.units ½ (3)(2) = 3 ½ (3)(2) = 3 3 x 3 = 9 ½ (3)(2) = 3 ½ (3)(2) = 3 Expression: Which sections have the same area? 4(3) + 1(9) Surface Area: 12+9 = 21 sq.units Sections A B D and E

½ (4)(3) = 6 ½ (4)(3) = 6 (2)(5) = 10 (2)(5) = 10 (4)(4) = 16 SOLUTION: The surface area is 40 sq. units ½ (4)(3) = 6 ½ (4)(3) = 6 (2)(5) = 10 (2)(5) = 10 (4)(4) = 16 (5)(5) = 25 (5)(5) = 25 ½ (4)(3) = 6 (5)(2) = 10 (2)(5) = 10 ½ (4)(3) = 6 SOLUTION: The surface area is 90 sq. units

(1)(6) = 6 (1)(5) = 5 (1)(5) = 5 (1)(6) = 6 (5)(6) = 30 (5)(6) = 30 SOLUTION: The surface area is 40 sq. units ½ (4)(4) = 8 (1)(6) = 6 (1)(5) = 5 ½ (3)(4) = 6 (1)(5) = 5 (1)(6) = 6 (3)(4) = 12 ½ (3)(4) = 6 (5)(6) = 30 (5)(6) = 30 ½ (4)(4) = 8 SOLUTION: The surface area is 82 sq. units

FINISH FOR HOMEWORK Thursday, March 5, 2015 ‘A’ Week

FINISH FOR HOMEWORK Thursday, March 5, 2015 ‘A’ Week A=5x2½ A=7½ x 2½ A=5x7½ A=7½ x 2½ A=5x2½ A=5x7½