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Byju's Answer
Standard IX
Mathematics
Introduction to Circles
In the given ...
Question
In the given figure, seg
A
B
is a diameter of the circle,
m
(
a
r
c
A
K
C
)
=
30
0
. Find the value of
m
(
a
r
c
B
M
C
)
.
.
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Solution
We are given
∠
A
B
C
=
30
o
, now we are to find
∠
B
A
C
as this is the measure of
a
r
c
B
M
C
.
Now in the given figure if we join
A
and
C
then
Δ
ABC is right-angled triangle.[ As semi-circular angle is right-angle].
Then from
Δ
ABC we get
∠
A
C
B
=
90
o
and
∠
A
B
C
=
30
o
.
Then the remaining angle
∠
C
A
B
will be of
60
o
.
So
m
(
a
r
c
B
M
C
)
=
60
o
.
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Q.
In the given figure, seg AB is a diameter of a circle with centre C. Line PQ is a tangent, which touches the circle at point T. seg AP ⊥ line PQ and seg BQ ⊥ line PQ. Prove that, seg CP ≅ seg CQ.