Thanks to Segar Rogers for sharing these beautifully typeset tasks on complementary angles.

In his own words ” I think we maybe gloss over complementary angles too quickly … there’s a good range of problems to tackle with them. And I hadn’t appreciated until recently that you can find a missing angle in any triangle purely by using complementary angles without ever going near the 180° interior angle sum. (And the 180° approach immediately becomes just a process, whereas with a complementary angle approach you feel like you’re building a solution which is a little more interesting I think).”