# ∠aob=90° ∠cba=30° ∠cab =???

1
by nesthangam
Is that ok Nesthangam
But Then u Shouldnt have Reported My Answer
is it a question from cbse syllabus
Well IDK i m from ICSE board
yes it is from cbse

2016-03-07T22:33:25+05:30

### This Is a Certified Answer

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∠BCA = 1/2∠BOA --- Angle subtended by the same arc to the centre is double the angle subtended at the circumference
∠BCA = 1/2 * 90
∠BCA = 45°

∠BCA + ∠CAB + ∠ABC = 180° - -Angle Sum Property
45 + ∠CAB + 30 = 180
∠CAB = 180 - 75
∠CAB = 105°

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Thankx
Sairamya If its Whole Question Then Y Dont U Solve It
Even u can solve it half Bcoz the Question Lacks Some Vital Information
hey this is the whole question ..i have copied it from a pdf..
ya there may be a mistake