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Standard IX
Mathematics
Properties of Isosceles Triangle
Question
ABC is a right isosceles triangle right angled at A. Find the value of
∠
B
and
∠
C
.
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Solution
Verified by Toppr
∠
A
=
90
o
∠
B
=
∠
C
(Given the triangle is isosceles)
In
△
A
B
C
∠
A
+
∠
B
+
∠
C
=
180
o
90
+
∠
B
+
∠
C
=
180
o
∠
B
+
∠
C
=
90
o
∠
B
+
∠
B
=
90
o
2
∠
B
=
90
o
Hence,
∠
B
=
∠
C
=
45
o
.
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