Answer:
Step-by-step explanation:
radius r = 4 in
slant height L = 15 in
base area = πr² = 16π in²
lateral area = πrL = 60π in²
surface area = 76π in²
r = 4×6, L = 15×6
base area = (4×6)²π = 16π×36
lateral area = 60π×36
surface area is multiplied by 36
Answer:
x = 10
Step-by-step explanation:
Using the sine ratio in the right triangle and the exact value
sin60° = 
, then
sin60° = 
= 
= ( cross- multiply )
2x = 20 ( divide both sides by 2 )
x = 10
Answer:
Rational
Step-by-step explanation:
A terminating decimal is a rational number.
A repeating decimal is a irrational number.
Since 8.27 terminates, it is rational.
Answer:
T.A. = 16√3 units²
Step-by-step explanation:
∵ The total area = the area of the four faces
∵ The four faces are equilateral triangles with side length 4
∵ Area of the equilateral Δ = 1/4 s² √3
∴ T.A. = 4 × 1/4 × 4² × √3 = 16√3 units²
