Q. ∠1 and ∠2 are complementary angles. If m∠1=(x+18)∘ and m∠2=(3x+12)∘, then find the measure of ∠2.Answer:
Definition of Complementary Angles: Understand the definition of complementary angles. Complementary angles are two angles whose measures add up to 90∘.
Equation Setup: Set up the equation based on the definition of complementary angles.Since angle 1 and angle 2 are complementary, we have:m/∠1+m/∠2=90∘Substitute m/∠1 with (x+18)∘ and m/∠2 with (3x+12)∘.(x+18)∘+(3x+12)∘=90∘
Combine Terms and Solve: Combine like terms and solve for x.x+18+3x+12=904x+30=90
Subtract and Solve for x: Subtract 30 from both sides of the equation.4x+30−30=90−304x=60
Divide to Find x Value: Divide both sides by 4 to find the value of x.44x=460x=15
Substitute x Value: Substitute the value of x back into the expression for m/∠2 to find its measure.m/∠2=(3x+12)∘m/∠2=(3(15)+12)∘m/∠2=(45+12)∘m/∠2=57∘