Answer:
ANSWER:
(c) 45°
Explanation:
∠B =
180
o
−
∠
A
⇒ ∠B =
75
=
105
Now, ∠B = ∠ABD + ∠CBD
⇒
B
D
+
60
⇒ ∠ABD =
45
⇒ ∠ABD = ∠ BDC =
(Alternate angles)
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Answers & Comments
Answer:
ANSWER:
(c) 45°
Explanation:
∠B =
180
o
−
∠
A
⇒ ∠B =
180
o
−
75
o
=
105
o
Now, ∠B = ∠ABD + ∠CBD
⇒
105
o
=
∠
A
B
D
+
60
o
⇒ ∠ABD =
105
o
−
60
o
=
45
o
⇒ ∠ABD = ∠ BDC =
45
o
(Alternate angles)