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primary 5 | Maths | Angles & Geometry
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Justin
Justin

primary 5 chevron_right Maths chevron_right Angles & Geometry chevron_right Singapore

I need help

Date Posted: 6 months ago
Views: 57
J
J
6 months ago
2/15 of the figure is unshaded

2/15 = 16cm²

1/15 = 16cm² ÷ 2 = 8cm²

1 - 2/15 = 13/15

So shaded area = 13 x 8 cm² = 104cm²

Notice that for both triangles, the common area between them is the unshaded part. Since both triangles are identical, they have identical areas.

This tells you that their shaded areas are equal. Which means 104cm² = 2 area A

So area of A = 104 ÷ 2 = 52 cm²
Justin
Justin
6 months ago
Thanks sir