Answer:

Step-by-step explanation:
<u>When you want to find area out of diameter. These are the steps you follow:</u>
1. Convert diameter to radius
2. Solve for area
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<u>First step:</u>
When you need to convert diameter to radius, you just need to divide by 2


<u>Second step:</u>
Use formula 
A = 
A = 
A= 
That would make a cone. The circular base being the bottom and the curved surface being the other part
Angle 1 = 4x - 16
angle 2 = 2x + 10
4x - 16 + 2x + 10 = 90
combine like terms
6x - 6 = 90
add 6 to both sides
6x = 96
divide both sides by 6
x = 16
angle 1 = 4x - 16 = 4(16) - 16 = 48
angle 2 = 2x + 10 = 2(16) + 10 = 42