Question

B=X +20 SUPLEMENTARY FIND A

Answer 1

Step-by-step explanation:

Since, ∠A and ∠B are supplementary angles.

∠A + ∠B = 180

∠A + x + 20 = 180 ∴∠A + x + 20 – 20 = 180 – 20 …. (Subtracting 20 from both sides)

∠A + x = 160 ∴m∠A + x – x = 160 – x ….(Subtracting x from both sides)

∠A = (160 – x)°

∴The measure of ∠A is (160 – x)°