A same side interior angle of two parallel lines is 20° less than the other same side interior angle. Find the measures of these two angles.

Same side interior angles are supplementary, meaning they add up to 180°. We can call the two angles x° and (x + 20)° and we can write the equation:

x + x + 20 = 180

2x + 20 = 180

2x = 160

x = 80 which means the angles are 80° and 80 + 20 = 100°.

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.