Develop a unit of learning at the end of which learners should be able to: reduce any angle in the first quadrant of a Cartesian plane to a difference of 90 and an acute angle.

Question

I have tried it as follows:
1. write down any three acute angles.
2. draw the angles in a Cartesian plane
3. express the angle in terms of 90-A
4. use your expression to find three acute angles identified in 1 and reflect on your answer