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Question

ABC is a triangle in which CAB=80 and ABC=50, BE, AF and CD are the altitudes and O is the orthocentre. What is the value of AOB?


A
65
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B
70
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C
50
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D
130
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Solution

The correct option is D 130
ACB=50CFO=CEO=90 FOE=360(90+90+50)=130So, AOB=FOE=130

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