Fix link to touchstart event (mdn#30797)

files/en-us/web/api/touch/radiusx/index.md

@@ -20,7 +20,7 @@ A number.
 
 This example illustrates using the {{domxref("Touch")}} interface's {{domxref("Touch.radiusX")}}, {{domxref("Touch.radiusX")}} and {{domxref("Touch.rotationAngle")}} properties. The {{domxref("Touch.radiusX")}} property is the radius of the ellipse which most closely circumscribes the touching area (e.g. finger, stylus) along the axis **indicated** by the touch point's {{domxref("Touch.rotationAngle")}}. Likewise, the {{domxref("Touch.radiusY")}} property is the radius of the ellipse which most closely circumscribes the touching area (e.g. finger, stylus) along the axis **perpendicular** to that indicated by {{domxref("Touch.rotationAngle")}}. The {{domxref("Touch.rotationAngle")}} is the angle (in degrees) that the ellipse described by `radiusX` and `radiusY` is rotated clockwise about its center.
 
-The following simple code snippet, registers a single handler for the {{domxref("Document/touchstart_event", "touchstart")}}, {{domxref("Element/touchmove_event", "touchmove")}} and {{domxref("Element/touchend_event", "touchend")}} events. When the `src` element is touched, the element's width and height will be calculate based on the touch point's `radiusX` and `radiusY` values and the element will then be rotated using the touch point's `rotationAngle`.
+The following simple code snippet, registers a single handler for the {{domxref("Element/touchstart_event", "touchstart")}}, {{domxref("Element/touchmove_event", "touchmove")}} and {{domxref("Element/touchend_event", "touchend")}} events. When the `src` element is touched, the element's width and height will be calculate based on the touch point's `radiusX` and `radiusY` values and the element will then be rotated using the touch point's `rotationAngle`.
 
 ```html
 <div id="src">…</div>