2questions for 15 pionts

1. which best describes the polygon whose vertices in the coordinate plane are (-5,,-3)(1,-3)(1,0)

a. only equilateral
b. only equiangular
c. regular
d. congruent

2. which best describes the polygon whose vertices in the coordinate plane are (-3,0) (3,0) (0,-3)

a. only equilateral
b. only equiangular
c. regular
d. none of the above