Question

Answer 1

\(30,p\perp m\\ 31,\left\{{}\begin{matrix}a\perp AB\\b\perp AB\end{matrix}\right.\Rightarrow a//b\Rightarrow\widehat{C}=180^0-\widehat{D}=60^0\\ 32,D\\ 33,a//b\Rightarrow\widehat{N_1}=\widehat{M}=50^0\left(A\right)\)

Answer 2

30.thì P vuông góc với M

31.60⁰

32.D

33.50⁰