calculate the perimeter and area of all figures robotic maths
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a) A = 60 x 125 = 7500 m2
b. A = π(r^2) = π(5^2) = 78.54 cm2
c) A = 0.5 x 20 x 10 = 100 m2
d) A = 0.5 x (60 + 45) x 50 = 2625 km2
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