Illuminations: A Log's Diameter
Illuminations: A Log's Diameter
A plywood sheet is 45 by 45 inches. What is the approximate diameter of the log the sheet was made from?
The diameter d of a circle equals c/π, where c is the circumference, but please do not make a mistake. The diameter of the log is not 45/π.
Puzzle provided by Kordemsky: The Moscow Puzzles (Dover)
National Council of Teachers of Mathematics
Math Topics
Area, Perimeter & Volume, Geometry
High School
9th Grade, 10th Grade, 11th Grade, 12th Grade
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Resource k12
Illuminations: A Log's Diameter
A plywood sheet is 45 by 45 inches. What is the approximate diameter of the log the sheet was made from?
The diameter d of a circle equals c/π, where c is the circumference, but please do not make a mistake. The diameter of the log is not 45/π.
Puzzle provided by Kordemsky: The Moscow Puzzles (Dover)
National Council of Teachers of Mathematics
Math Topics
Area, Perimeter & Volume, Geometry
High School
9th Grade, 10th Grade, 11th Grade, 12th Grade
Download PDFs
Descriptions of PDFs
Problem and solution
What are you looking for?
Organization
National Council of Teachers of Mathematics
Website URL
Type of Resource
Activity Sheet
PDF File
PDF File