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Byju's Answer
Standard X
Mathematics
Properties of Sides of 45°-45°-90° Triangles
A square and ...
Question
A square and an equilateral triangle have equal perimeter. If the diagonal of the square is
12
√
2
then the area of the triangle is:
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Solution
REF.Image
4
a
=
3
b
[given]
Diagonal of square =
12
√
2
area of triangle = ?
a
2
+
a
2
=
(
12
√
2
)
2
[
∵
Pythagoras theroem]
2
a
2
=
12
×
12
×
2
a
2
=
12
×
12
×
2
2
a
=
12
∴
b
=
4
3
×
12
=
16
∴
area =
√
3
4
a
2
⇒
√
3
4
×
16
×
16
⇒
64
√
3
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