Greeting Card MathChristmas Card Box

Look at your teacher’s box and estimate the

number of M&M’s in the box.

Find the area and perimeter of your card when it is

closed.

Find the area and perimeter of your card when it is open.

Cut the greeting card in half along the crease to create two congruent rectangles.

Make a shutter-fold

Make a shutter fold by folding outer edges to the center.

Repeat in the other direction.

Flatten all creases

Use scissors and cut on the vertical line up to the horizontal line, on the bottom

right fold. STOP AT THE HORIZONTAL LINE!!!

Repeat in all 4 corners as shown above.

Turn your card so that you can see the message.

Fold the left and right rectangles up at the

creases and then the top and bottom rectangles to form a rectangular box.

To secure the box together, fold the overlap of the larger end rectangles over the slender

sides and crease.

Length

Height

Width

Find the volume of your Greeting Card Box.

Take measurements in centimeters.V = l·w·h

Finding Surface AreaMethod 1

The surface area is the area of the outside of your box.

Find the area of each rectangle on the outside of your box.

How many rectangles (faces) are on your box?

6

Method 1Find the surface area of your

box.Find the area of each

rectangle.Front rectangle: length = _______ x width = ________ Area = _______

Back rectangle: length = _______ x width = ________ Area = _______

Side rectangle: length = _______ x width = ________ Area = _______

Side rectangle: length = _______ x width = ________ Area = _______

Top rectangle: length = _______ x width = ________ Area = _______

Bottom rectangle: length = _______ x width = ________ Area = _______

Add the areas of each rectangle together to get the surface area of the box.

Method 2Find the surface area of your

box.

SA = 2(height)(length) + 2(height)(width) + 2(length)(width)

Length

Height

Width

The winner to the estimation contest is the person who

estimated closest to the volume of their box.