Which of the following has opposite sides that are congruent and parallel? select all that apply.
a
a trapezoid
b
a rectangle
c
a square
d
a rhombus

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

Angles 1 and 2 are complimentary angles. angle 1 = 52 degrees. what is the measure of angle 2?

The length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?