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Advent calendar 2022
1 December
All 2022 advent puzzles
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One of the vertices of a rectangle is at the point \((9, 0)\). The \(x\)-axis and \(y\)-axis are both lines of symmetry of the rectangle.
What is the area of the rectangle?
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The only way this is possible is if the rectangle is this square:
The area of this square is
162
.
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elections
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integration
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decahedra
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christmas
volume
addition
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speed
cards
crossnumbers
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prime numbers
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wordplay
factorials
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indices
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xor
binary
games
prime factors
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angles
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pentagons
axes
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averages
integers
digital clocks
tangents
sport
products
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shape
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logic
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factors
rectangles
star numbers
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even numbers
median
algebra
grids
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square roots
scales
multiples
means
sums
routes
dodecagons
fractions
symmetry
multiplaction squares
cube numbers
cryptic clues
geometric means
ellipses
graphs
multiplication
time
ave
circles
planes
consecutive numbers
coordinates
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sum to infinity
the only crossnumber
dice
folding tube maps
albgebra
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division
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tiling
sets
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