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Byju's Answer
Standard VII
Mathematics
Complementary and Supplementary Angles
Find the angl...
Question
Find the angles in each of the following.
The angle which is two times its complement
A
60
∘
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B
120
∘
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C
30
∘
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D
None of these
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Solution
The correct option is
B
60
∘
Two Angles are Complementary when they add up to 90 degrees.
Let the
∠
B
is complement of
∠
A
Now according to question
∠
A
=
x
then
∠
B
=
2
x
Hence
∠
B
+
∠
A
=
x
+
2
x
=
90
o
⟹
3
x
=
90
o
⟹
x
=
30
o
∠
A
=
30
o
and
∠
B
=
60
o
Since
∠
B
is
2
times its complement
∠
A
.
So the angle which is two times its complement
60
o
.
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