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Find surface area of -
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144 units²
✔️Area of rectangle 1 = L*b
L = 11
b = 3
Area of rectangle 1 = 11*3 = 33 units²
✔️Area of rectangle 2 = L*b
L = 11
b = 4
Area of rectangle 2 = 11*4 = 44 units²
✔️Area of rectangle 3 = L*b
L = 11
b = 5
Area of rectangle 3 = 11*5 = 55 units²
✔️Area of the two triangles = 2(½*ba se * height)
ba se = 4
height = 3
Area of the two traingles = 2(½*4*3)
= 12 units²
✔️Surface area of the right triangle = area of rectangle 1 + area of rectangle 2 + area of rectangle 3 + area of the two triangles
= 33 + 44 + 55 + 12
= 144 units²
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