How to do it...

To complete this recipe, do the following:

1. Create the following columns in the R02_Table table:

Y = SQRT(POWER(50,2) - POWER('R02_Table'[X],2))

A = 
    VAR __Table = ALL('R02_Table')
    VAR __Max = MAXX(__Table,[X])
    VAR __Min = MINX(__Table,[X])
    VAR __Increment = 
        DIVIDE(
            __Max - __Min + 1,
            COUNTROWS(__Table)
        )
RETURN
    [Y]*__Increment

2. Create the following measures:

AreaSemiCircle = PI()*POWER(50,2)/2

AreaApproximation = 
    VAR __Table = ALL('R02_Table')
    VAR __Max = MAXX(__Table,[X])
    VAR __Min = MINX(__Table,[X])
    VAR __Increment = 
        DIVIDE(
            __Max - __Min + 1,
            COUNTROWS(__Table)
        )
RETURN
    ABS(
        SUMX(
            ADDCOLUMNS(
                __Table,
                "__Area",[Y]*__Increment
            ),
            ABS([__Area])
        )
    )

% Error = 
    DIVIDE(

        [AreaApproximation] - [AreaSemiCircle],
        [AreaSemiCircle]
    )

3. On a Report page, create a Line and clustered column chart visualization and place the X column from the R02_Table table into the Shared axis area.
4. In the same Line and clustered column chart visualization, place the A column from the R02_Table table into the Column values area and the Y column from the R02_Table table into the Line values area.
5. On the same Report page, create a Card visualization and place the AreaApproximation measure into the Fields area for the visual.
6. On the same Report page, create a second Card visualization and place the AreaSemiCircle measure into the Fields area for the visual.
7. On the same Report page, create a third Card visualization and place the % Error measure into the Fields area for the visual.