A vertex can represent

The Vertex is a point located in the western hemisphere of a chart (the right-hand side) that represents the intersection of the ecliptic and the prime vertical. In astrology, it is considered an auxiliary Descendant. The Anti-Vertex is the point that is exactly opposite the Vertex.

Step-by-step explanation:

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation:

the formula for the equation of a circle is (x – h)2+ (y – k)2 = r2, where (h, k) represents the coordinates of the center of the circle, and r represents the radius of the circle. if a circle is tangent to the x-axis at (3,0), this means it touches the x-axis at that point.