Answers fast

Quick answers

1. a–G, b–E, c–A, d–B, e–D, f–F, g–C, h–H

2. The tangent at point \(P\) is perpendicular to the radius drawn to \(P\).

3. Jonah is not correct. The shaded region is bounded by a chord and an arc, so it is a segment of the circle. Since it is larger than half the circle, it is the major segment; the smaller part is the minor segment.

Why the matching works

• Circumference = distance all the way around the circle → G
• Chord = straight line joining two points on the circle → E
• Diameter = a chord passing through the centre → A
• Tangent = line touching the circle at exactly one point → B
• Arc = part of the circumference → D
• Sector = “pizza-slice” region bounded by two radii and an arc → F
• Segment = region cut off by a chord and an arc → C
• Radius = distance from the centre to the circumference → H

A useful check: a diameter is a special chord, and a tangent is always at \(90^\circ\) to the radius at the point of contact. A chord always divides a circle into two segments: one minor and one major—so a segment can be larger than half the circle.