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Byju's Answer
Standard IX
Mathematics
Angle Sum Property of a Triangle
In Δ ABC, ...
Question
In
Δ
A
B
C
,
∠
A
=
43
o
and
∠
C
=
70
o
.
What is the measure of
∠
B
?
A
63
o
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B
65
o
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C
66
o
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D
67
o
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Solution
The correct option is
C
67
o
By angle sum property, the sum of angles is
180
o
.
∠
A
+
∠
B
+
∠
C
=
180
o
43
o
+
∠
B
+
70
o
=
180
o
∠
B
=
180
o
−
113
o
∠
B
=
67
o
.
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0
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Q.
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Q.
In
Δ
A
B
C
it is given that
∠
A
=
65
o
and
∠
B
=
70
o
. FInd
∠
C
.
Q.
In
Δ
A
B
C
,
∠
A
=
56
o
and
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B
=
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.
What is the measure of
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C
?
Q.
In the given figure, ABCD is a parallelogram in which
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D
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B
=
70
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=
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.
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