Answer:

Step-by-step explanation:
Given


Required
Determine the circumradius, R
The circumradius is calculated as follows;

Substitute the values of AB, BC and AC

Evaluate the denominator


Take square root of 230400

<em>(Approximated)</em>
<em>Hence, the circumradius is 9.63</em>
Answer:
i believe the answer is 286°
Step-by-step explanation:
a minor arc=to the central angle's measure.
a circle has 360°
so 360-74=286