Cho tia Ap, vẽ góc qAp bằng 30 độ

a, Cho tia Ap. Vẽ $\widehat{qAp}$=${30}^o$
b,$cho tia Ck. Vẽ \widehat{rBt }$​=${90}^o$
c,$cho tia Ck. Vẽ \widehat{hCk}$​=${45}^o$