I think I'm missing something really basic here, I'm attempted to draw a circle split into thirds (think a pie chart as an example).
For this, I presumed I could draw three arcs with the following start/end values (in radians (rounded for brevity)):
arc 1: start 0, end: 2.09
arc 2: start 2.09, end: 4.18
arc 3: start 4.18 end, 6.28
I've console.logged the actual arcs I'm drawing to check the params, listed below:
arc(400,300,100,0,2.0943951023931953)
arc(400,300,100,2.0943951023931953,4.1887902047863905)
arc(400,300,100,4.1887902047863905,6.283185307179586)
Unfortunately when I do this I get the correct start and end points, but the arc doesn't seem to extend into the centre of the circle. As shown in the below image (ignore the centre circle)

Can anyone point me in the right direction to make the arcs draw the complete circle? it seems like they draw directly from the start to end radian in a straight line, but I was expecting them to go into the centre like a wedge.