Rob cuts a 15-foot wire into 8 equal pieces. about how long is each piece ?

Which statement explains how you could use coordinate geometry to prove that quadrilateral abcd is a parallelogram? -5 -4 -3 -2 -1 t 1 2 3 4 prove that all sides are congruent and have slopes that are opposite reciprocals prove that segments ad and ab are congruent and parallel prove that opposite sides are congruent and have equal slopes prove that segments bc and cd are congruent and parallel

Can someone answer this question? : )

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles