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Could someone please tell me what the surface area formula is for cylinders and rectangular prisms thanks

2Lw + 2lh+2wh https://www.basic-mathematics.com/surface-area-of-a-rectangular-prism.html

Thanks now I need the surface area of rectangular prism

Thank you so much

Thank you bobpursly for the link.

So helpful.

Of course! I'd be happy to explain the surface area formulas for cylinders and rectangular prisms and how to use them.

Let's start with the cylinder. The surface area of a cylinder is the sum of the areas of its two circular bases and the lateral surface area, which is the area of the curved surface between the bases. Here's how you can calculate it:

1. Find the area of each circular base. The formula for the area of a circle is A = πr², where A is the area and r is the radius of the base.
2. Multiply the area of one base by 2 to account for both bases.

Now, to find the lateral surface area:

3. Calculate the circumference of one of the circular bases using the formula C = 2πr, where C is the circumference and r is the radius.
4. Multiply the circumference by the height of the cylinder to get the lateral surface area.

Finally, add the areas of the bases and the lateral surface area together to obtain the total surface area. The formula for the surface area of a cylinder is:

SA = 2πr² + 2πrh

Moving on to rectangular prisms, the surface area is the sum of the areas of all six faces. Each face is a rectangle, so we calculate the area of each rectangle and add them up. Here's how to do it:

1. Calculate the area of the base rectangle by multiplying its length (L) by its width (W).
2. Multiply the base area by 2 since there are two identical base rectangles in a rectangular prism.
3. Calculate the area of each of the four side rectangles by multiplying their length (L) by their height (H) or their width (W) by their height (H).
4. Add up the areas of all six rectangles to find the total surface area.

The formula for the surface area of a rectangular prism is:

SA = 2(LW + LH + WH)

Remember, the formulas are just mathematical representations. To actually find the surface area, plug in the appropriate measurements into the formulas.

Surface Area of a Cylinder. To find the surface area of a cylinder add the surface area of each end plus the surface area of the side. Each end is a circle so the surface area of each end is π * r2, where r is the radius of the end. There are two ends so their combinded surface area is 2 π * r2.