Question

27. See the figure. Find angle ABC
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Answer 1

Answer:

60°

Step-by-step explanation:

we know that the sum of two opposite angles of a triangle is equal to the exterior angle.

so,

40° + < ABC= 100°

<ABC = 100°-40°

=60°

Answer 2

Answer:

answer= angle ABC is 60°

Step-by-step explanation:

Given ,CAB= 40°

ACD= 100°

according to the properties of triangle :-

angle CAB + angle ABC = angle ACD

40° + angle ABC = 100°

angle ABC= 100°- 40°

angle ABC = 60°