Question

Which angle is included between the sides AB and AC of ΔABC?
1. ∠B
2. ∠A
3. ∠C
4. none of these

Answer 1

2 angle A is included

Answer 2

∠A is included between the sides AB and AC of ΔABC. (Option 2)

• An angle is said to be included when it is formed due to the intersection of two lines with one common endpoint.
• Here, in ΔABC, the sides AB and AC are used to include the angle.
• The angle which is included is the one that forms at the common point of two sides. Here, the common point is A and so the angle formed is also ∠A.