Question Details

In △ABC, the side AB is produced to E and side CA is produced to D. If ∠BAD = 125° and ∠EBC = 100°, then which of the following is true ?

Options

A

△ABC is an isosceles triangle.

B

AB > BC

C

Difference between ∠ABC and ∠ACB is 35°

D

Difference between ∠BAC and ∠ACB is 20°

Show Answer

Correct Answer :

Option C

Difference between ∠ABC and ∠ACB is 35°

Solution :

Correct Option: Difference between ∠ABC and ∠ACB is 35°

Step-by-step Explanation:

1. Find BAC:
Since D-A-C forms a straight line, the angle BAD and BAC form a linear pair.
BAC+BAD=180°
Given BAD=125°:
BAC=180°-125°=55°

2. Find ABC:
Similarly, since A-B-E forms a straight line, the angle EBC and ABC form a linear pair.
ABC+EBC=180°
Given EBC=100°:
ABC=180°-100°=80°

3. Find ACB:
The sum of interior angles in ABC is equal to 180°.
BAC+ABC+ACB=180°
55°+80°+ACB=180°
135°+ACB=180°
ACB=180°-135°=45°

4. Check the difference between ABC and ACB:
ABC-ACB=80°-45°=35°

Thus, the statement "Difference between ∠ABC and ∠ACB is 35°" is true.

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