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ABC is a triangle in which ∠CAB=80∘ and ∠ABC=50∘. AE, BF and CD are the altitudes and O (intersection point of AE, BF, and CD) is the orthocentre. What is the value of ∠AOB? |
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Answer» ABC is a triangle in which ∠CAB=80∘ and ∠ABC=50∘. AE, BF and CD are the altitudes and O (intersection point of AE, BF, and CD) is the orthocentre. What is the value of ∠AOB? |
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