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Posts tagged with polygons

2x50c = stumped!

November4

A question in a high school maths exam has sparked heated online debate after students complained it was far too difficult. Australian Year 12 students in Victoria sat the VCE maths exam on October 30 and were faced with a problem that is sure to change the way they look at 50 cent coins forever. […]

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Great Galloping Galaxies – Saturn Has Hexagons!

June15

What is making the solar system’s largest polygon? First discovered in 1988, researchers have reproduced the physics of the hexagon in a lab only recently. But they still can’t tell us what is creating the environment required to generate the hexagon, which is shown here forming over the storm-laden north pole of this unusual planet […]

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10 x 9 x 8 + (7 + 6) x 5 x 4 x (3 + 2) x 1 = 2020

NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]

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