Question

O is the centre of this circle. Work out the size of angle CAB. Give reasons for your answer. A C O 36° B​

Answer 1

Explanation:

The 3 angles in a triangle sum up 180°

Note that angle BCA is a right angle , so it's 90°

then 180° = angle CAB + angle ABC + angle BCA

180° = angle CAB + 36° + 90°

180° - 36° - 90° = angle CAB

54° = angle CAB

Answer 2

the answer is 54

Explanation:

arc ACB is 180 degree