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Puzzles
Guess the diagonal
Source:
My Best Mathematical and Logic Puzzles
by Martin Gardner
Calculate the length of the diagonal CG.
Show answer & extension
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CG is equal to AF as they are both diagonals in a rectangle.
AF is a radius of the triangle, so AF = 10.
Therefore CG = 10.
Extension
Calculate the lengths of CI and CJ.
Calculate the lengths of HG.
Tags:
geometry
,
2d shapes
If you enjoyed this puzzle, check out
Sunday Afternoon Maths II
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