Hi there!

Therefore the answer is about 5.6
It increased by 7.7 degreese because it goes from -16.5 to -8.8. You would have to subtract 8.8 from 16.5 but it is easier to make them positive.
Ever time you add 1 you get the next.
4+1=5+1=6+1=7
X=x; a=6
x^2 + x^2 = 6^2 (pythagorean theorem)
2x^2 = 36
x^2 = 36/2 = 18
x = square root of 18
x = 2.62 (to the nearest hundredth)