Angles, PI, Inconsistent Units

[LyleHardin]

I'm trying to find the volume of sweeping a triangle along an arc. Simple math, not so simple in Revit for me.

I need to get the length of the arc to multiply by the area of the triangle (which I have).

I'm having a number of issues. 

• Getting the Angle of the arc to Radians
• Using PI in a formula
• Inconsistent units

I'm stumped on putting the variables together in my Parameters so they report the volume for me.

Right now, I just need L for the Arc Length.  

Length = (Radius * Angle in radians)

It's getting the Angle in Radians that is stumping me. Can someone give me a clue? Even then, I'll probably get the Inconsistent Units warning.

[LyleHardin · Accepted solution]

Got it figured out. It comes down to units. I ended up making new variables as 'numbers' instead of 'length', 'area', 'volume' etc. Then when doing calculations I made sure to cancel out the units by multiplying or dividing by 1' or by 1 rad (for 1 radian). I love Revit, but really hate this unit policing we must do.

[ToanDN · Accepted solution]

[LyleHardin]

Ah! That answers the pi thing. Thanks, as it was still stumping me.

[NurulHusnaKamil]

hi i wanted to find the formula for angle..so i need to change the radian to angle by = angle (in radians) * (180/π). Tried to change to revit pi which is pi() and also divided by 1 unit, but it still give me inconsistent units. What do i need to change? i also tried Angle_radian/1 but still same problem. Inconsistent units.