In ΔABC If ∠B=∠C and ∠A=80∘, then ∠C= ___.
40∘
50∘
60∘
70∘
Let ∠B=∠C=x∘
x+x+80∘=180∘......(sum of angles of a Δ,)
2x=100
x=50∘
In ΔABC, AB = AC and ∠B=50∘. Then ∠A=?(a) 40∘ (b) 50∘ (c) 80∘ (d) 130∘
In ΔABC, BC = AB and ∠B = 80°, then ∠A is equal to:
In ΔABC,∠A=30∘,∠B=40∘ and ∠C=110∘. The angles of the triangle formed by joining the mid-points of the sides of this triangle are
In ΔABC, BC = AB and ∠B=80∘. Then, ∠A=?(a) 50∘ (b) 40∘ (c) 100∘ (d) 80∘