Answer:
90 degree
Step-by-step explanation:
because BA is perpendicular to DA
A=90⁰
B=x
C=40⁰
D=80⁰
we know,
A+B+C+D=180⁰
therefore ,
90+x+40+80=360
210+x=360
x=360_210
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Answers & Comments
Answer:
90 degree
Step-by-step explanation:
because BA is perpendicular to DA
Step-by-step explanation:
A=90⁰
B=x
C=40⁰
D=80⁰
we know,
A+B+C+D=180⁰
therefore ,
90+x+40+80=360
210+x=360
x=360_210
x=150
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