Greeting Card Math Christmas 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 Area Method 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 1 Find 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 = _______ 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 2 Find 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.