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primary 5 | Maths | Area & Volume
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Joel
Joel

primary 5 chevron_right Maths chevron_right Area & Volume

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Date Posted: 9 months ago
Views: 37
J
J
9 months ago
Triangle BGD is common to both. So ABGH is 11cm² smaller than GFED.

GF = BF - BG = 11 cm - 4 cm = 7 cm

Area ABGH + 11 cm² = Area GFED

AH x GH + 11 cm² = GF x ED

4 cm x GH + 11 cm² = 7 cm x (11 cm - GH)

4 cm x GH + 11 cm² = 77 cm² - 7cm x GH

11 cm x GH = 66 cm²

GH = 66 cm² ÷ 6 = 6 cm

ED = 11 cm - GH = 11 cm - 6 cm = 5 cm

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Jan
Jan's answer
8 answers (A Helpful Person)
1st
Solved with algaebra. Hope this help you.
Joel
Joel
9 months ago
Thank you