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Puzzles
Showing puzzles tagged "pentagons".
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14 December
All 2022 advent puzzles
~
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Holly draws a line of connected regular pentagons like this:
She continues the pattern until she has drawn 204 pentagons. The perimeter of each pentagon is 5. What is the perimeter of her line of pentagons?
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The two pentagons at the end of the pattern each contribute 4 units to the permimeter. The remaining 202 pentagons each contribute 3 units to the perimeter. This gives a total perimeter of 2×4+202×3=
614
.
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pentagons
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cube numbers
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2d shapes
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symmetry
digital products
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square roots
hexagons
ave
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squares
pascal's triangle
graphs
square numbers
decahedra
crosswords
people maths
odd numbers
partitions
fractions
scales
triangle numbers
quadratics
parabolas
dominos
digits
geometric mean
digital clocks
indices
shape
christmas
dice
clocks
star numbers
folding tube maps
colouring
quadrilaterals
matrices
albgebra
cryptic crossnumbers
trigonometry
addition
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calculus
sets
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angles
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binary
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