Question

GEOMETRY HELP 70 POINTS FAST!!!!!!!

FIND SURFACE AREA. IT’S OKAY IF YOU DID ONE BUT I WOULD PREFER IF YOU DID BOTH THANKS

Answer 1

9)D
Because you already have your radius but you need to find your hight. You use a triangle and do a^2+b^2=c^2 and that gives you 9.75. Then plug those two numbers into the surface area of a cone equation.
8)C
Because you need to find something the radius by dividing 18 by 2 which gives you 9. Then you need to find the hight which you make a triangle and do a^2+b^2=c^2 and that gives you 19.98. And plug those numbers into the surface area of a cone formula

Answer 2

8) Surface area: PI x 9 x (9 + 20.1) = 822.78 mi^2

9) Surface area = PI x 3 x (3+8.5) = 108.38 yd^2