Question

If AB is the diameter of the circle, then

Answer 1

Answer:

AB is a diameter of the circle  

Angle subtend by diameter at any point on the circumference is 90  

∘

.

So,∠ACB=90  

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Now, by angle sum property of triangle  

∠A+∠B+∠C=180  

∘

 

x+40  

∘

+90  

∘

=180  

∘

 

x=50  

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Step-by-step explanation: