PSLE Math 2023 Paper 2 Question 12

(Circles Perimeter and Area Question)

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Handwritten notes with a diagram of six circles, three of which are shaded and outlined in different colors. The notes include calculations for the diameter and perimeter related to the circles.

PSLE Math 2023 Paper 2 Question 12

Illustration explaining how to find the area of shaded parts in overlapping circles, with diagrams and handwritten notes in blue and purple ink.

Diameter = 7cm x 2 = 14cm
a) Perimeter of shaded part = circumference of 3 circles
    = (227 x 14cm) x 3
    = 132cm

b) Using the cut-and-paste:
Area of shaded part = (14cm x 14cm) x2
        = 392cm^2 + 154cm^2
        = 546cm^2 

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