The surface area of a sphere can be approximated as follows:
surface area = 411,
where ris the radius of the sphere;
tt is a constant that is roughly equal to 3.
using the simple approximation above, calculate the surface area of a sphere
with a radius of 2 meters.

50.27

Step-by-step explanation:

4π × 2²≈50.27

a net is a diagram that shows a “flattened” view of a solid. in a net, each face and base is shown with all of its dimensions. a net can also serve as a pattern to build a three-dimensional solid.

a pyramid is a three-dimensional object with a base that is a polygon and triangular faces that meet at one vertex.

" the net of a triangular pyramid consists of four triangles. the base here we are given of the pyramid is a equilateral   triangle, and the lateral faces are also triangles "

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70