The Code 

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Public Class Form66

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    '## Hypotenuse Theorem OOP Language Coding consists :

    '## [1] Private Function Hypotenuse Formula

    '## [3] Sub Routines to delegate Program Calculus Ordered Flow

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    '## Dimension Variables for Calculus ##
    Dim Side1 As Single
    Dim Side2 As Single
    Dim HypotenuseSide As Single
    Dim DecimalPlace As String = ("n3")

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    '## Initiate Private Function Hypotenuse Formula ##
    Private Function Hypotenuse(Length1 As Single, Length2 As Single) As Double
        Hypotenuse = (Length1 ^ 2 + Length2 ^ 2) ^ (1 / 2)
    End Function

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    Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click

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        '## Show Index Page ##
        Form65.Show()
        Me.Hide()

    End Sub

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    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

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        '## Hypotenuse Function consists of three Sub Routine ##
        '## Sub Routine(1) ##
        HypotenuseAssign()

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        '## Sub Routine (2) ##
        HypotenuseFormula()

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        '## Sub Routine (3) ##
        HypotenuseLabel()

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    End Sub

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    '## Sub(1) ##
    Sub HypotenuseAssign()
        Side1 = TextBox1.Text
        Side2 = TextBox2.Text
    End Sub

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    '## Sub(2) ##
    Sub HypotenuseFormula()
        HypotenuseSide = Hypotenuse(Side1, Side2)
    End Sub

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    '## Sub(3) ##
    Sub HypotenuseLabel()
        Label1.Text = HypotenuseSide.ToString(DecimalPlace)
    End Sub

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    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click

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        '## Clear TextBox & Labels for Re-Calculus.
        TextBox1.Text = ""
        TextBox2.Text = ""
        Label1.Text = ""

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    End Sub

End Class

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