1.what is surface area?

surface area is the total area of the outside of a 3-D shape

2. how do you find the surface area?

first take your shape, and draw what it

would look like if it were opened and laid out:

Then measure the sides,

and find the area of each separate square (or rectangle)

.... suppose the sides are all 2cm long.

The formula to find the area of a square is

Length x Width so the area of each square would be 4cm²

Finally, use the formula to find the surface area.

you can either use:

(area = a)

a+a+a+a+a+a= surface area

4cm²+4cm²+4cm²+4cm²+4cm²+4cm²= 24cm²

OR

**2 (HxL)+ 2(HxW)+ 2(LxW)**

2(2x2)+ 2(2x2)+ 2(2x2)

2(4)+2(4)+2(4)=

8cm+8cm+8cm= 24cm²

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THE VOLUME OF A RECTANGULAR PRISM

1. what is volume?

the amount of space an object takes up. in this case, a rectangular prism

2. How do you find the volume?

take a rectangular prism, and measure

it's length, width, and depth (also called height)

Then use the formula to find out the volume. You can use:

length x width x depth

3cm x 5cm x 2 cm

=30cm³

OR

Area of base x depth

(3cm x 5cm) x 2cm

15cm² x 2cm= 30cm³

## 1 comment:

Great job i liked how you showed the befor and after pictures when you drew your net. :):):):)

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