I need help on this question !

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

What is the gcf of 20c^3-5c^4+30c^6

❤️ (geometry) does the construction demonstrate how to copy an angle correctly using technology a) yes; the distance between points a and f was used to create circle h b) yes; the distance between points f and g was used to create circle h c)no; the distance between points a and f was used to create circle h d) no; the distance between points f and g was used to create circle h