Question

D
In
LABC = 690
LACB=310
then
LBD C = ?
690
31
В​

Answer 1

Answer:

answer is 80 degree

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Answer 2

Step-by-step explanation:

In Δ ABC

angel A + angel ABC + angel ACB = 180 ( angel sum property of triangle)

= A + 69+ 31+ =180

= A+ 100= 180

= A = 80

Now,

by theorem angels in the Same segment of a circle are equal.

so, angel A = angel D

therefore angel BDC = 80

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