Sir Mike Ambrose is the author of the question.
Area green, exactly is;
Area square with length 8 cm - area trapezoid with two parallel length 8 cm and 2 cm, and height 3 cm - area trapezoid with two parallel length 7 cm and 2cm, and height 5 cm - area triangle with height 3√(5) cm and base ½(3√(5)) cm.
= 64-½(30)-½(45)-¼(3√(5))²
= ¼(256-195)
= 61/4
= 15¼ cm²
= 15.25 cm²
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