Rhombus or diamond, but not a square or rectangle
Answer: last option (5π√146 units²)
Step-by-step explanation:
To solve the exercise you must apply the formula for calculate the lateral area of a cone, which is shown below:

where r is the radius but L is the slant height.
As you can see in the figure attached:

But you need to find the slant height with the Pythagorean Theorem (L would be the hypotenuse):

Substitute into the formula, then:
units²
Answer:
I think A, but i'm not the smartest
Step-by-step explanation:
4) 10% or 1/10
5) 24% or 6/25
6) 34% or 17/50
8) 8% of 2/25