Plz answer only if u know u are correct

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

D(5, 7). e(4,3), and f(8, 2) form the vertices of a triangle. what is mzdef? oa. 30° ob. 45° oc. 60° od 90°

Candy lives in the center of town. her friend darlene lives 28 miles to the east and her friend dana lives 21 miles north. approximately how far do dana and darline live apart ?