Question

Draw ∆ ABC in which ∠A = 120°, AB = AC = 3 cm. Measure ∠B and ∠C.

Answer 1

Steps of construction:

1. Draw a line segment AC of length 3 cm.
2. Draw $\angle XAC=120°$.
3. Cut an arc on AX at a distance of 3 cm at B.
4. Join BC to get the required triangle.

By measuring,we get
$\angle B=\angle C=30°$.