Which condition is sufficient to show that quadrilateral DEFG is a parallelogram?

A. ∠GDE is supplementary to ∠DEF
B. ∠GDE is supplementary to ∠EFG
C. ∠GDE is supplementary to ∠DEF and ∠EFG
D. ∠GDE is supplementary to ∠DEF and ∠FGD

Name the quadrilaterals that have four equal sides.

Guys i need ! graded assignment grade 8 checkpoint 2, part 2 answer the questions below. when you are finished, submit this assignment to your teacher by the due date for full credit. total score: of 9 points (score for question 1: of 4 points) 1. the cost of renting a car for a day is $0.50 per mile plus a $15 flat fee. (a) write an equation to represent this relationship. let x be the number of miles driven and y be the total cost for the day. (b) what does the graph of this equation form on a coordinate plane? explain. (c) what is the slope and the y-intercept of the graph of the relationship? explain.

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b