Fluffydream Fluffydream

18-05-2018
Mathematics

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Circle O is shown below. what is the measure of angle bac?

43.5 degrees
46.5 degrees
93 degrees
174 degrees

Circle O is shown below what is the measure of angle bac 435 degrees 465 degrees 93 degrees 174 degrees class=

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CastleRook CastleRook

28-05-2018

Given that AOC is the diameter and AO na d OB are the radii, then ΔAOB is an isosceles triangle. Thus the base angles ∠A=∠B
thus
∠BAC=∠A will be found as follows:
sum of angles in a triangle is 180
thus
180-87=
=93
hence
∠A=∠B=93/2=46.5°

Answer: 46.5°

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