Question

Can somebody explain how to do this

don't give me an answer

Answer 1

Alr because you know the A is 90 and a full circle is 360 so in order to find B you need to subtract A from 360 which is 90-360= your answer (which you told me not to tell you)

Answer 2

270°

Explanation:

a reflex angle is an angle which is larger than 180° but smaller than 360°

an angle around a point is 360°

so to find angle B we do
`360-90` to give 270

so angle B is 270°