<Dl> <Dd> <Ul> <Li> If B is inside the circle, then ∠ ABC> 90 ° </Li> <Li> If B is on the circle, then ∠ ABC = 90 ° </Li> <Li> If B is outside the circle, then ∠ ABC <90 ° . </Li> </Ul> </Dd> </Dl> <Dd> <Ul> <Li> If B is inside the circle, then ∠ ABC> 90 ° </Li> <Li> If B is on the circle, then ∠ ABC = 90 ° </Li> <Li> If B is outside the circle, then ∠ ABC <90 ° . </Li> </Ul> </Dd> <Ul> <Li> If B is inside the circle, then ∠ ABC> 90 ° </Li> <Li> If B is on the circle, then ∠ ABC = 90 ° </Li> <Li> If B is outside the circle, then ∠ ABC <90 ° . </Li> </Ul> <Li> If B is inside the circle, then ∠ ABC> 90 ° </Li>

If point b is equidistant from the vertices of