Answer:
so adorable and cities what's not dogs dissatisfied as of plan
V=πr2h is how you find it
All the angles should add up to 360°.
8x+10x+9+21x-12+90=360°
Group like terms together.
So,8x+10x+21x+9+90-12=360
39x+87=360
39x=360-87
39x=273
x=7
If a theory is challenged, then that means that the theory may have a specific flaw, making it "not good"
If noone gives u the right answer try using wolfram alpha
