Q. ∠1 and ∠2 are supplementary angles. If m∠1=(2x−26)∘ and m∠2=(5x−11)∘, then find the measure of ∠2.Answer:
Set up equation: Supplementary angles add up to 180 degrees. We can set up an equation using the expressions for m/angle 1 and m/angle 2.m/angle 1+m/angle 2=180 degrees(2x−26)+(5x−11)=180
Combine like terms: Combine like terms on the left side of the equation.2x+5x−26−11=1807x−37=180
Isolate variable: Add 37 to both sides of the equation to isolate the term with the variable x.7x−37+37=180+377x=217
Solve for x: Divide both sides of the equation by 7 to solve for x.77x=7217x=31
Find angle 2: Now that we have the value of x, we can find the measure of angle 2 by substituting x back into the expression for m/angle 2. m/angle 2=5x−11 m/angle 2=5(31)−11
Calculate angle 2: Calculate the value of m/angle 2.m/angle 2=155−11m/angle 2=144 degrees