Answer:
Associative Property of Addition
Step-by-step explanation:
Looking at the expression, you can see that the numbers have been grouped differently. Based on the Associative Property of Addition, the sum of the numbers is the same despite the different pairing.
I did my calculation and your answer should be 87.9
hope this helped :)
Rotate by angle α = 90°, around a center point (0; 0)
