In words, the surface area of a cube is the area of the six squares that cover it. The area of one of them is a*a, or a 2 . Since these are all the same, you can multiply one of them by six, so the surface area of a cube is 6 times one of the sides squared.
It C) This is because the sum of the two smaller sides in a triangle has to be larger than the bigger sides. 10+12=22. 22 is smaller than 24 which is the third side this no triangle is formed
