Answer:
• (1)EF: Diameter.
,
• (2)EGF: Semicircle.
,
• (3)G: Point of tangency
,
• (4)HJ: Tangent line.
• (5)CDK: Arc
• (6)Line BF: Radius
• (7)A: Centre
• (8)KF: Tangent line.
,
• (9) CD: Secant line.
,
• (10) GK: Chord.
,
• (11)CK: Arc
Explanation:
(1)EF is a chord passing through the centre of a circle.
• The term that best describes EF is ,the diameter.
(2)EGF is an arc that subtends the diameter.
• The term that best describes arc EGF is a semicircle.
(3)The line passing through G touches the circle at just one point, that is, point G. Thus, G is the point of tangency to the circles.
(4)The line HJ touches circles A and B at point G only. Thus, HJ is a tangent line.
(5)CDK is an arc of circle A.
(6)Line BF is a line from the centre of the circle to the circumference. Thus, BF is the radius of the circle.
(7)A is the centre of the circle.
(8)The line KF touches circles A and B at points K and F respectively. Thus, KF is a tangent line.
(9)The line CD passes through the circle and touches the circle at two different points. CD is a secant line.
(10)The line GK touches the circle at two different points but does not extend outside. GK is a chord.
(11)CK is an arc of circle A.
