I don't believe a line can intersect a circle at three points, but they sure can at two. When a line touches a circle at one point it is called a

**tangent**. When a line touches at two points it is called a

**secant**. See the attached diagram (thanks wikipedia). Don't confuse

**secant **with

** chord**. A

**chord **is a line segment, while a

**secant **is a line. So the

**secant **keeps on going while a

**chord **stops at the circumference.

To solve for x in:

Multiply both sides by 4,

Then divide both sides by 3,

For the triangle, we know the perimeter is 52, so