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primary 5 | Maths | Percentage
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Kc
Kc

primary 5 chevron_right Maths chevron_right Percentage chevron_right Singapore

Please help with working. Thanks

Date Posted: 3 weeks ago
Views: 23
Eric Nicholas K
Eric Nicholas K
3 weeks ago
That shaded area is equivalent to 3 complete squares shaded out of 7.

So there are 4 unshaded.

As we add unshaded squares, the number of shaded squares remain unchanged at 3 complete squares.

25% (1 unit) —> 3 squares
100% (4 units) —> 12 squares

So we must add 12 - 7 = 5 more unshaded squares.
J
J
3 weeks ago
Area of shaded triangle

= ½ x base x height

Base = 3 sides of a square
Height = 2 sides of a square

So area

= ½ x 3 side of a square x 2 side of a square

= ½ x 6 x (1 side of square x 1 side of square)

= 3 x area of 1 square

= Area of 3 squares



Or


Area of the rectangle = area of 6 squares.

the triangle is half of the rectangle as the diagonal cuts the rectangle into 2 equal parts.

So its area is also half of the rectangle area

6 ÷ 2 = 3

So it has an area of 3 squares

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Cheyenne Liu
Cheyenne Liu's answer
6 answers (Tutor Details)
1st
Take shaded triangle at 25%