Wich expressions are equivalent?

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.

a reflection across the x axis and a 90 degree rotation left and right.

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)

the answer is: -22 also a

hope i

-lavira: )