Answer:
90 degrees
Step-by-step explanation:
angle ABC is a right angle
Answer:the answer is the first
Step-by-step explanation:
Because the expression can be written as -10r2/2r2+4+5r/2r2+4+3/2r2+4
486/6 = 81
Square root 81 = one side length = 9m volume = 9^3 = 729