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{{float right|[[File:Theta.jpg|border|500 px]]}}
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==Slope gradient==
==Expressing slope==
===Slope gradient===
Slope gradients are expressed as Y:X where Y is a single unit of rise and X is the corresponding run. It can be calculated by dividing the rise by the run:
Slope gradients are expressed as Y:X where Y is a single unit of rise and X is the corresponding run. It can be calculated by dividing the rise by the run:
e.g.:<math>\frac{rise}{run}=\frac{4\ m}{12\ m}=\frac{1}{3};we\ say\ the\ slope\ =1:3\ or\ 1\ in\ 3</math>
e.g.:<math>\frac{rise}{run}=\frac{4\ m}{12\ m}=\frac{1}{3};we\ say\ the\ slope\ =1:3\ or\ 1\ in\ 3</math>
==Slope percentage==
===Slope percentage===
Slope percentage is calculated similarly by dividing rise by run, but then multiplying by 100 to get a percentage:
Slope percentage is calculated similarly by dividing rise by run, but then multiplying by 100 to get a percentage:
e.g.:<math>slope=\left (\frac{rise}{run}\right )\times 100=\left(\frac{4\ m}{12\ m}\right)\times 100= 33\%</math>
e.g.:<math>slope=\left (\frac{rise}{run}\right )\times 100=\left(\frac{4\ m}{12\ m}\right)\times 100= 33\%</math>
==Slope in degrees==
===Slope in degrees===
Expressing a slope in degrees requires using the ''inverse tangent'' trigonometric function.
Expressing a slope in degrees requires using the ''inverse tangent'' trigonometric function.
e.g.:<math>\tan \theta =\left ( \frac{4\ m}{12\ m} \right ); \theta =\tan^{-1}\left ( 0.33 \right )=18.3^{\circ}</math>
e.g.:<math>\tan \theta =\left ( \frac{4\ m}{12\ m} \right ); \theta =\tan^{-1}\left ( 0.33 \right )=18.3^{\circ}</math>
<ref>Ontario. O. Reg. 191/11: INTEGRATED ACCESSIBILITY STANDARDS, 2011. https://www.ontario.ca/laws/regulation/r11191.</ref>
==Accessibility==
The Accessibility for Ontarians with Disabilities Act<ref>Ontario. O. Reg. 191/11: INTEGRATED ACCESSIBILITY STANDARDS, 2011. https://www.ontario.ca/laws/regulation/r11191.</ref> provides a foundation, a bare minimum to which public spaces must be designed.
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