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3 years ago

In the diagram below, angle BAC = 34°.

Mathematics

1 answer:

Svetllana [295]3 years ago

8 0

Answer:

a) 90°

b) 56°

Step-by-step explanation:

If we connect O with B to get two isosceles triangles: ΔAOB and ΔBOC

∠BOC= is central angle ans is twice as ∠BAC, so equals to 2*34°= 68°

Then ∠BCA= (180°- 68°)/2= 56°

∠ABC= ∠ABO+∠CBO= 34°+56°= 90°

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3 years ago

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Answer:

Step-by-step explanation:

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Discriminant

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As 33 > 0 the equation does not have complex roots.

Learn more about discriminants here:

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Learn more about complex roots here:

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