Help fast no guessing timed !!

A is 25in

B is 128.5in

Step-by-step explanation:

A. The radius is half of the diameter, so 50in is the diameter so 50in divided by 2 is 25in so is the radius.

B. This time we are find the the circumference. So the formula is πd or pi times diameter or two pi radius. So it would be 50+50(3.14)/2. divide by two because its a semi circle and add 50 because of the diameter. You would only do this if its not a full circle . So now if you simplify you have 25(3.14)+50 which gives you 128.5in.

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 "

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