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Advent calendar 2022
1 December
All 2022 advent puzzles
~
More information
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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,
coordinates
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Most recent collections
Advent calendar 2023
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List of all puzzles
Tags
money
perfect numbers
colouring
sum to infinity
axes
functions
wordplay
time
cryptic crossnumbers
indices
geometric mean
products
dates
taxicab geometry
cryptic clues
geometric means
determinants
circles
folding tube maps
angles
hexagons
numbers
chalkdust crossnumber
quadratics
coordinates
combinatorics
complex numbers
dominos
multiplication
range
partitions
books
people maths
binary
integration
cards
averages
sequences
geometry
crossnumber
algebra
palindromes
parabolas
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decahedra
number
percentages
sets
consecutive numbers
triangles
crosswords
probability
logic
sport
albgebra
square numbers
polynomials
ellipses
tiling
games
spheres
rugby
digital products
tangents
3d shapes
dice
speed
factors
planes
menace
median
graphs
perimeter
differentiation
the only crossnumber
floors
odd numbers
lines
addition
bases
symmetry
remainders
multiples
coins
area
star numbers
chess
doubling
probabilty
squares
consecutive integers
matrices
prime numbers
proportion
triangle numbers
ave
surds
digital clocks
shape
irreducible numbers
polygons
expansions
trigonometry
integers
fractions
digits
sums
means
rectangles
pentagons
calculus
grids
shapes
unit fractions
arrows
gerrymandering
square roots
division
mean
scales
even numbers
tournaments
clocks
factorials
christmas
chocolate
cube numbers
routes
pascal's triangle
volume
quadrilaterals
cubics
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dodecagons
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