Please help I’ve been stuck on this question for hours

Prove that the segments joining the midpoint of consecutive sides of an isosceles trapezoid form a rhombus.
Find the slope of DE and FG.

Jordan rides his bike 6 7/15 miles every day to deliver newspapers and to go to and from school. if his ride to and from school is 4 3/10 miles, how many miles is the trip to deliver newspapers? 1 1/3 1 1/6 2 1/6 2 4/5

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

Compare the following pair of numbers a and b in three ways. a. find the ratio of a to b. b. find the ratio of b to a. c. complete the sentence: a is percent of b. a=120 and b=340 a. the ratio of a to b is . b. the ratio of b to a is . c. a is nothing percent of b.