Any help will be much appreciated. Tks!

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# Question

# Answer

mr.tan

a. Total circumference = 2π x AP + 2π x AQ = 2π x (AP + AQ) = 2π x 10 = 62.8 cm (note: this is 20π) b. Note that the green and blue arcs are semi-circles. So we can join them to form 2 circles, with diameters AP (green) and AQ (blue) respectively. Their circumference = π x AP + π x AQ = π x (AP + PQ) = 10π. The red and orange arcs are 1/5 of total circumference found in Part a. So they are 1/5 x 20π = 4π. Therefore total perimeter = 10π + 4π = 14π = 43.96cm. (If you find this useful, please accept the answer.)

Nickal

Thanks for the help!