Question

Using your knowledge of circles, label the following on the given diagram: chord, tangent, radius, secant, point of tangency and diameter. Name a minor arc and a major arc.

Answer 1

A chord is any line that touches two ends on a circle. Line segment AC is a chord.

A tangent is a line that only touches one point on the circle. The purple line on top of the circle is a tangent line.

A radius is a line from the center to any point on the circle. The red line is a radius.

A secant is like a chord, except it is a line and keeps going. The cyan (sky blue) line is a secant line.

A point of tangency is the point that the tangent line touches. The yellow point on the purple line is the point of tangency.

A diameter is a straight line that crosses the center and two points on the circle. You can say it’s two radii put together. Line segment BD (green) is a diameter.

Hope this helps!