## Welcome to H3 Maths

Blog Support for Growing Mathematicians

## Posts tagged with elevation

### Finding Gradients – Pt II

July25

Google Earth provides a practical tool to find gradients between two points . In this example, we are interested in the gradient between Mt Fuji and Yamanakako. The gradient is equal to the rise in elevation divided by the run (horizontal distance). In this portion of the cross-section we can calculate the gradient to = a […]

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### Tour with Altitude

July22

As Bradley Wiggins rides (on a bike with better wheels than the one above) to a British win in the Tour de France, here are some questions to do with the hill stages of this incredible race: Category 3 climbs last approximately 5 kilometres have an average grade of 5 percent. How many metres will […]

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### Cool Maths Tool in Google Earth

June5

Explore the elevations of a particular path through the Elevation Profile in Google Earth. To start, either draw a path or open an existing one. Once you’ve chosen a path from the Places panel, there are two ways to see its Elevation profile. Either go to Edit > Show Elevation Profile, or right-click on your path from the Places panel […]

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#### Post Support

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)?]