Diameter of the dartboard as given in the question = 18 inches
Then
Radius of the dartboard will be = 18/2 inches
= 9 inches
We already know that
Circumference of a circle = <span>2π</span>r
We also know that the value of <span>π = 3.14159
Then
Circumference of the dartboard = 2 * 3.14159 * 9 inches
= 56.548 inches
= 56.55 inches
So the radius of the dartboard is 9 inches and the circumference of the dartboard is 56.55 inches. I hope the procedure is absolutely clear to you.
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The 2 because we don't know if it is exactly two or if was was rounded up/ down to 2.
When <span>constructing a circle circumscribing about a triangle, we bisect any two lines and not angles.
It is not necessary to bisect the three sides.
The most logical mistake the learner could have made are:
</span><span>A. The compass involuntarily changed the radius setting when drawing circle and</span>
<span>C. The altitudes were constructed incorrectly.</span>
