Surface area of an open box
Count the base and four sides only.
Try it
For an open 8 by 5 by 3 cm box, use 40 + 2×24 + 2×15.
Check your reasoning
The result is 118 cm². Explain when an internal liner would require different measurements.
Count the base and four sides only.
For an open 8 by 5 by 3 cm box, use 40 + 2×24 + 2×15.
The result is 118 cm². Explain when an internal liner would require different measurements.