sopniladangol2009
Answered

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Sagot :

#b

See AB||CD

Hence

[tex]\\ \rm\Rrightarrow <BGH=<GHD[/tex]

[tex]\\ \rm\Rrightarrow 90=90[/tex]

[tex]\\ \rm\Rrightarrow \dfrac{1}{2}<BGH=\dfrac{1}{2}<GHD[/tex]

[tex]\\ \rm\Rrightarrow <HGP=<GHP=45°[/tex]

Now using angle sum property

[tex]\\ \rm\Rrightarrow a+45+45=180[/tex]

[tex]\\ \rm\Rrightarrow a=180-90[/tex]

[tex]\\ \rm\Rrightarrow a=90[/tex]

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