1. Thursday 3/5/15 ‘A’ Week

2. 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 cm
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

3. 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

4. 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

5. 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

6. (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

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

8. 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