Incorrect angle of micro:bit "tilt angle"

[asondemita]

Expected Behavior

I thought that the "title angle" block of micro:bit would also return 90 at 90 °.

Actual Behavior

When angle is 90 °, "title angle" block returns 100.

For reference, the "motor position" block of LEGO EV3 returns 90 at 90 °.

Steps to Reproduce

Operating System and Browser

Widows10, Chrome 71.0.3578.98, Scrach Link 1.1.28.0

[thisandagain]

/cc @ericrosenbaum @khanning