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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
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cryptic crossnumbers
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angles
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binary
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balancing
multiples
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xor
geometric mean
sum to infinity
expansions
surds
digital clocks
palindromes
remainders
planes
cryptic clues
probability
2d shapes
dominos
consecutive integers
advent
colouring
indices
star numbers
routes
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complex numbers
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shapes
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combinatorics
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lines
doubling
tournaments
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digits
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factors
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