Answer:
Use the formula for surface area of a cone:
SA = π[tex]r^{2}[/tex] · πrs
'π' stands for the pi(22/7 or 3.14) and 'r' stands for the radius which is being squared. ← This will represent the area of the base of this cone.
'π' stands for the pi(22/7 or 3.14), 'r' stands for the radius, and 's' will stand for the slant height of this cone. ← This will represent the area of the lateral surface of this cone.
What we know;
- Slant height = 8 cm
- Radius = 3 cm
Correct me if i'm wrong with these measurements.
Now plug in what you know into the formula:-
SA = π[tex]r^{2}[/tex] · πrs
SA = 3.14(3^2) · 3.14(3) · 8
Quick note: The ' ^ ' symbol stands for a power symbol, meaning that any base is raised to the power of any exponent.
Solve!
SA = 3.14(9) · 3.14(3) · 8
SA = 28.26 · 9.42 · 8
SA = (28.26 · 9.42) · 8
SA = 266.2092 · 8
SA = 2,129.6736, and rounded to the nearest whole is 2,130.
The surface area of this cone is, 2,130 square centimetres.
