
VisualTrig Interactive
Trigonometry Calculators

Right Triangle Calculator
Click and edit side lengths, top or base angle and hit Calculate or drag slider to recalculate.
Click a side or angle entry to activate, and enter values for any 2 known sides (Green + Blue) or any 1 side and 1 angle to calculate the remaining sides and angles.
The Green entry is animated when you move the slider control.
Enter Millimeters or Decimal Inches. If inches is selected, mouse over side entries to show fraction conversion.
Only 2 entries will be active at any time. One green, the other blue. All other sides and angles are calculated from the current 2 active entries.
Click any side or angle entry to make it active and enter or edit its value. The input background color will change to indicate active and non active entries and the formulas at right will change to reflect the current active selection of known sides / angles.
Drag slider to animate the current green active side or angle to recalculate and redraw the right triangle.

If you're cutting concrete, stone or
ANYTHING and there's
DUST  DON'T TAKE THE RISK
Don't cut it, or cut it wet so there's
NO DUST 
Silicosis Sucks
What do we think?  They're 2 different things:
A
Meter is a device to measure things  like a Volt Meter or a Parking Meter
A
Metre is about 3'3~3/8"
Although diameter and perimeter as measurements  don't seem to fit very well
If the US ever goes Metric, you'll be able to use a Meter to measure Meters  A Meter Meter
All Imperial inputs and dimensions are actual physical finished sizes (unless otherwise noted)
All Metric Inputs in Millimetres (unless otherwise noted)