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Question
primary 6 | Maths
| Geometry
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Date Posted: 4 years ago
Views: 236
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
...
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
...
See 1 Answer
done
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You have to cut the isosceles triangle into 9 parts.
Date Posted:
4 years ago
very easy to understand
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