The same reasoning applies to the obtuse angles in the figure: ∠2, ∠3, ∠6, and ∠8 are all congruent to each other. 2. When parallel lines are cut by a transversal line, any one acute angle formed and any one obtuse angle formed are supplementary.
Calculate the percentage increase,work out the difference (increase) between the two numbers you are comparing. Then divide the increase by the original number and multiply the answer by 100.
