It is a pattern so 2*3=6
3 times 4 is 12
4 times 5 is 20
5 times 6 is 30
6 times 7 is 42
so, 9 times 8 is 72.
please vote as brainliest
I might be wrong.
I guess that in total all the angles equal to 180, that being said...
m∠BAC = 79
Multiply it by its self 3 times for example 2 to the square root of 3 2x2x2