In the diagram, O is the centre&nbsp;of the circle, \(\bar{RT}\) is a diameter, &lt; PQT...

In the diagram, O is the centre of the circle, \(\bar{RT}\) is a diameter, < PQT...

WAEC 2015

In the diagram, O is the centre of the circle, \(\bar{RT}\) is a diameter, < PQT = 33\(^o\) and < TOS = 76\(^o\). Using the diagram, find the value of angle PTR.

A. 76^o
B. 71^o
C. 57^o
D. 33^o

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Correct Answer: Option C

Explanation

PTR = 180º - (90 + 33)º

= 180º - 123

= 57º

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In the diagram, O is the centre of the circle, \(\bar{RT}\) is a diameter, < PQT...

Correct Answer: Option C

Explanation

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