Answer:
The sum of 78 and -78 is zero.
Step-by-step explanation:
I used a calculator ;)
117, just add the two and subtract from 180
Answer:
16
Step-by-step explanation:
perimeter of B = 21
divide by 3 to get each side: 21/3 = 7 = Y
perimeter of hexagon is 50. subtract 2Y: 50 - 14 = 36
divide 36 by 4 to find X = 9
add X + Y
Answer:
It should be the last one because rigid transformations doesn't change in size just where it is
