Question

Can you help? i forgot how to find the surface area!

Answer 1

Surface Area: 204mm^2

Explanation:

The formula for the surface area of a rectangular prism is: 2(lw + wh +lh)

Our length, width and height are:

Length: 15mm

Width: 3mm

Height: 4mm

Then, we plug it in.

2(15x3 + 3x4 + 15x4)

2(30 + 12 + 60)

2(102)

204mm^2

Therefore, our surface area for the rectangular prism is 204mm^2.

Answer 2

To find the surface area of a cuboid, add the areas of all 6 faces. You can also label the length (l), width (w), and height (h) of the prism and use the formula, SA=2lw+2lh+2hw, to find the surface area.

Explanation: