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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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fractions
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perfect numbers
arrows
averages
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rectangles
products
digital products
scales
cryptic clues
folding tube maps
functions
money
axes
partitions
books
perimeter
grids
ellipses
3d shapes
crosswords
lines
chocolate
christmas
menace
proportion
triangle numbers
colouring
odd numbers
addition
numbers
differentiation
logic
speed
geometry
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coordinates
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gerrymandering
rugby
binary
regular shapes
the only crossnumber
means
decahedra
digital clocks
cubics
factors
volume
dice
clocks
expansions
probability
quadrilaterals
algebra
complex numbers
even numbers
people maths
taxicab geometry
division
probabilty
dodecagons
squares
geometric means
multiplication
angles
consecutive integers
chalkdust crossnumber
balancing
indices
circles
sport
pascal's triangle
albgebra
tiling
surds
advent
routes
number
spheres
doubling
cards
percentages
bases
integers
ave
pentagons
dates
integration
calculus
sums
tangents
time
star numbers
multiples
graphs
coins
area
palindromes
symmetry
crossnumber
games
prime numbers
dominos
combinatorics
cube numbers
polygons
hexagons
median
matrices
digits
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geometric mean
tournaments
floors
sets
quadratics
elections
determinants
crossnumbers
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