Question

the segment joining two points on a circle is called a/n
select one:
a. radius
b. chord
c. tangent
d. secant

two circles with the same center are called
select one:
a. circumscribed
b. inscribed
c. concentric
d. externally tangent

Explanation:

1. For the first question: A radius connects the center to one point on the circle, a tangent touches the circle at one point, a secant is a line passing through two points on the circle (not a segment). A chord is defined as the segment joining two points on a circle.
2. For the second question: Circumscribed/inscribed refer to shapes around/inside another, externally tangent circles touch at one point but share no center. Concentric circles are defined as circles that share the same center.

Answer:

1. b. chord
2. c. concentric