Given the side lengths, determine whether the triangle is acute, right, obtuse, or not a right angle. 15, 17, 21

Find the slope of the line below . enter your answer as a fraction or decimal. use a slash mark ( / ) as the fraction bar if necessary

Find the area of the unshaded square

Which part of a 2-column proof is the hypothesis of the conjecture? a) given b) reasons c) prove d) statements ! i think it's b but i'm not quite