Question

If the diameter of a circle is 18 cm, then the radius of the circle is ____cm. *

If two lines have only one point in common, what are they called? *​

Answer 1

Answer:

6 cm

Step-by-step explanation:

because the radius is half of the diameter

Answer 2

Answer:

1) If the diameter of a circle is 18 cm, then the radius of the circle is 9 cm

2) When two or more lines cross each other in a plane, they are called intersecting lines. The intersecting lines share a common point, which exists on all the intersecting lines, and is called the point of intersection. Here, lines P and Q intersect at point O, which is the point of intersection.