In the given figure; BE = DC, then :

1. AD = DC

2. AE = BE

3. AD = AE

4. ∠ABE = ∠DAC

In △ ABC and △ PQR, AB = AC, ∠C = ∠P and ∠B = ∠Q; then triangles are :

1. isosceles but not congruent

2. isosceles and congruent

3. congruent but not isosceles

4. neither isosceles nor congruent.

Calculate :

(i) ∠ADC

(ii) ∠ABC

(iii) ∠BAC

In the following figure, AB = AC; BC = CD and DE is parallel to BC. Calculate :

(i) ∠CDE

(ii) ∠DCE