It means when the planes cross each other it is perpendicular to each other
Multiply the base which is 18.65 and multiply it by the height which is 9 3/10 and then multiply by half and that estimates to B. 90 cm
The answer would be B 11 yards 1 foot
Answer:
10 divided by 2 is 5
8 times 3 is 24
54 minus 6 is 48
9 to the third power is 729
Step-by-step explanation: