J's answer to Apple's Primary 6 Maths Measurement Singapore question.
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The longer straight side of each △ is covered by the shorter straight side of another △(9 cm)
So 36 - 9 = 27 is not enough as you need to subtract another 9 cm to account for this covered portion.
27 cm - 9 cm = 18 cm
Perimeter = 4 × 18 cm = 72 cm
So 36 - 9 = 27 is not enough as you need to subtract another 9 cm to account for this covered portion.
27 cm - 9 cm = 18 cm
Perimeter = 4 × 18 cm = 72 cm
Date Posted:
3 years ago
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