Question

In the below figure, ∠ABC = 69°, , ∠ACB = 31°, find , ∠ BDC.



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Answer 1

Step-by-step explanation:

80 is the correct answer i think soo

Answer 2

In △ABC

∠BAC+∠ABC+∠ACB=180° (Angle sum property)

• ∠BAC+69° +31° =180°
• ∠BAC=180° −100° =80°

For segment BADCB,

∠BDC and ∠BAC are angles in the same segment. So, they must be equal.

∴ ∠BDC=∠BAC (Angles in the same segment are equal)

∠BDC=80°

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