Q:
# What are internally tangent circles?

Internally tangent circles occur when two circles on the same plane intersect at exactly one point and one circle lies within the other. Externally tangent circles occur when two circles on the same plane intersect at exactly one point, but one circle lies outside the other circle.

Continue ReadingCircles are internally tangent if the distance between the centers of the circles is equal to the absolute value of the radius of the first circle minus the radius of the second circle. Internally tangent circles have a common internal tangent. A line that is tangent to a circle exists on the same plane as the circle and intersects the circle at exactly one point. A common internal tangent is a line tangent to two circles that also intersects the line that joins the center of the two circles. A common external tangent is a line tangent to two circles, but it does not intersect the line that joins the center of the two circles.

In mathematics, students may be asked to draw a circle that is tangent to three existing circles. This is known as Apollonius' Problem. In history, the Desborough Mirror is a bronze mirror composed of arcs of tangent circles. It was created somewhere between 50 B.C. and A.D. 50 during the Iron Age.

Learn more about Geometry-
Q:
## What are the steps in proving lines are parallel?

A: Parallel lines are lines along the same plane that never intersect, even though they are of infinite length. If you are working on a construction project, ... Full Answer >Filed Under: -
Q:
## What is the centroid of a right triangle?

A: The centroid of any triangle, right triangles included, is the point where the angle bisectors of all three vertices of a triangle intersect. Given a trian... Full Answer >Filed Under: -
Q:
## What is an example of perpendicular lines in real life?

A: One common example of perpendicular lines in real life is the point where two city roads intersect. When one road crosses another, the two streets join at ... Full Answer >Filed Under: -
Q:
## What is the intersection of two rays with a common endpoint?

A: The vertex is the common endpoint when two rays intersect to form an angle. The formed angle is named by using three points. One point is on each of the tw... Full Answer >Filed Under: