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Mathematics

Grade9

Easy

Question

The measure of $angle B A O$ is ______.

30°
56°
60°
64°

The correct answer is: 60°

We are asked to find the measure of $angle B A O$
The diagonals bisect each other perpendicularly.
$text In end text increment A O B comma angle A O B plus angle O B A plus angle B A O equals 180 degree$
$angle B A O plus 90 degree plus 30 degree equals 180 degree$
$angle B A O equals 60 degree$

Therefore the measure of $angle B A O$ is 60°

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