Macro help for right angle diagram.

JohnWilson · #3 08-27-2012, 01:51 AM

PowerPoint doesn't have an ACos function (unlike Excel) which makes it difficult to get the Angle from a Cosine

You can write a User defined function though (hope your math is good!).

Code:

Function GetAngle(ThisCos As Double) As Double
Const PI As Double = 3.141592
Dim Acos As Double
Acos = Atn(-ThisCos / Sqr(-ThisCos * ThisCos + 1)) + 2 * Atn(1)
GetAngle = Round(Acos * 180 / PI, 2)
End Function

From your normal code you would use this :

Code:

Dim theAngle As Double
theAngle = GetAngle(0.866)
MsgBox theAngle

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