Vertical angles are angles that are across each other
Vertical angle theorem is that all vertical angles are congruent.
You can do basic angle chasing, naming the angles x and the others y. 180-x=y and 360=2x+2y. Then x=x, proving they are vertical angles.
Yes because if you simplify both of the ratios they are equal.
For girls it is 30 to 12, which simplified (divided by 3) is 10 to 4 (divided by 2) is 5 to 2
For boys it is 40 to 16 which simplified (divided by 4) is 10 to 4 (divided by 2) is also 5 to 2. Therefore they are both equal.
D is the answer because -10 plus -6 will give you the middle number -16.
3×=-(-2×+2)6
3x= 12×-12
12=12×-3×
12=9×
×=12/9
×=4/3
