Question

pls answer this and no spam

Answer 1

Answer:

87°

Step-by-step explanation:

By using Angle sum property

a + 36° + 57° = 180°

a + 93° = 180°

a = 180° - 93°

a = 87°

Answer 2

Answer:

Step-by-step explanation:

Let ABC be a given triangle.

And ∠A =a, ∠B=36°,∠C=57"

We know that, Sum of three angles of a triangle is 180°.

∴ ∠A + ∠B + ∠C = 180°

⇒ a + 36° + 57° = 180°

⇒ a + 93° = 180°

⇒ a = 180° - 93° = 87°

∴ ∠A = a = 87° is the answer.