Atriangle has vertices (0, 0, 0), (1, 1, 1), and (0, −4, 9). find its area.

Kelly is three years younger than her sister. the sum of their ages is 34 years. how old is kelly and how old is her sister?

Answer this 30 points and brainliest!

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