Question

In angle АВС A B = AC and
LB = 70 Find LA?
In​

Answer 1

Answer:

∠A = 40°

Step-by-step explanation:

In ΔABC,

AB = AC

∴ ∠B = ∠C            [∵ Angle opposite to equal sides are equal]

∠B = ∠C = 70°

Now in ΔABC,

∠A + ∠B + ∠C = 180°

∠A + 70° + 70° = 180°

∠A + 140 = 180

∠A = 180 - 140

∠A = 40°

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