Answer:
Option B is right
Step-by-step explanation:
We have in a triangle there are some properties inherent.
One is the perpendicular bisectors of all sides are concurrent.
These three concur at a point called the circumcentre of the triangle.
When we draw perpendicular bisector for a side AB, we get that all points on the perpendicular bisector are equidistance from A and B.
When we take the point of intersection of perpendicular bisector of AB and BC, we have the intersecting point S(say) is equidistant from A and B and also from B and C
In short this is equidistant from all 3 vertices and hence is centre of circumcicle of triangle ABC
The properties 1‚ 2‚ 4‚ and 5. are used
Answer:
A.

B. 150
Step-by-step explanation:
Let x be the number of people at the club last year.
The attendance of your club increased by 30% from last year. This means that if the last year attendance was 100%, this year attandance is 100% + 30% = 130%
Thus,
x people - 100%
195 people - 130%
A. Write a proportion:

B. Cross multiply:

The answer for this one is 39