## How can you find the intersection between a sphere and a YZ plane?

To find the intersection with the yz-plane, we set x=0: (y +6)2 + (z – 4)2=21, x=0, a circle in the yz-plane with center (0, -6, 4) and radius V21. 15. The radius of the sphere is the distance between (4, 3, -1) and (3,8,1): r=V(3 – 4)2 + (8 – 3)2 + (1 – (-1)]2=130.

## How do you find the intersection of two circles?

Make equations of circles that start with x2+y2 and subtract one from another to find equations of the radical axis, which is a straightline. This radical axis can be used to find the intersection of two circles. Simply plug in the x and y values for one circle into the other.

**Why is it called Venn diagram? **

Venn Diagrams are named after John Venn, a British logician. He wrote about them in an 1880 paper entitled “On the Diagrammatic and Mechanical Representation of Propositions and Reasonings” in the Philosophical Magazine and Journal of Science.

**What do you mean if two or three circles intersect? **

Answer : Two circles intersect to form a line called the radical line. If three circles intersect at a single point, the point of intersection is the intersection between their pairwise radical lines. This intersection is known as the radical centre.

### Do two circles intersect?

Two circles can intersect at imaginary points, one degenerate point or two points. A line is formed when two circles intersect in a single point, also known as the radical.

### How many ways can three circles intersect?

When we place a third circle, it is important to verify all five configurations relative A and B. This means that our second rule needs to become “For all 5*5=25 ways for a circle to be positioned relative to A and B, draw this circle.”

**Can two circles intersect at three points? **

If two circles have at most 3 points in common, they are one circle. Since a line can only intersect a circle twice, these three points cannot be collinear. They are not collinear and form a triangle, with both circles circumcribing the triangle.

**How many circles are in this picture? **

Sit down, buckle up, we’re going to blow your mind like Morpheus with Neo in The Matrix. There are actually 16 circles in this image. They are not visible? You can see the circles if you focus on the vertical lines around the box edges.

## Why is it called a bullseye on a dartboard?

The bull’s eye may be a result of English archers, who attempted to shoot an arrow through a bull’s eye socket to demonstrate their skills. The bullseye in darts is 5 feet 8 inches (1. 73m) above the floor.