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primary 6 | Maths | Geometry
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Hannah
Hannah

primary 6 chevron_right Maths chevron_right Geometry chevron_right Singapore

i need help asap

Date Posted: 2 months ago
Views: 28
snell
Snell
2 months ago
note:
XA = AD = DZ

so 2 big triangles make 1 sq

draw a vertical line down from Y to line XZ. this line cuts BC at P.
&
PC = 1/2AD = 1/2 DZ

this means area of triangle YPC is a quarter of area of 1 big triangle
&
area of 1 small triangle is half of area of 1 big triangle
&
area of 1 small triangle is a quarter of area of 1 sq

therefore,
triangle XYZ = 2 sq + 1/4 sq
108 = 2 1/4 sq
&
1 sq = 108 ÷ 2.25 = 48 cm²


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19 answers (A Helpful Person)
1st
You have to cut the isosceles triangle into 9 parts.
Hannah
Hannah
2 months ago
very easy to understand