Page 75 - NUMINO Challenge_C1
P. 75
Type 8-2 The Perimeter of a Rectangular Prism Net
There are two squares with sides that are 2 cm long, and four
rectangles with widths of 2 cm and lengths of 3 cm. Make a net by
connecting the six shapes so that it has the smallest possible
perimeter, and then find the perimeter.
1 Connect the equal sides of two 2 cm 3 cm rectangles and find the
perimeter. Which combined shape has the smaller perimeter?
2 cm 2 cm 3 cm 3 cm
3 cm 3 cm
2 cm 2 cm
2 In order to make a figure with the smallest perimeter, you should connect
as many long sides together as possible. Draw the net of a rectangular
prism with the smallest perimeter, and then find its perimeter.
1 cm
1 cm
72 NUMINO Challenge C1
There are two squares with sides that are 2 cm long, and four
rectangles with widths of 2 cm and lengths of 3 cm. Make a net by
connecting the six shapes so that it has the smallest possible
perimeter, and then find the perimeter.
1 Connect the equal sides of two 2 cm 3 cm rectangles and find the
perimeter. Which combined shape has the smaller perimeter?
2 cm 2 cm 3 cm 3 cm
3 cm 3 cm
2 cm 2 cm
2 In order to make a figure with the smallest perimeter, you should connect
as many long sides together as possible. Draw the net of a rectangular
prism with the smallest perimeter, and then find its perimeter.
1 cm
1 cm
72 NUMINO Challenge C1
