Question

c) Draw and name the radius, arc, sector, and chord in the semicircle below.
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Answer 1

Answer:

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Answer 2

The diagrams are in this attachment.

$\bold\gray{Radius}$

A line segment joining any point on the circle to its centre is called a radius of a circle.

$\boxed{\sf{Radius=diameter/2}}$

$\bold\gray{Arc}$

A continuous piece of a circle is called an Arc of a circle.

$\bold\gray{Sector}$

The part of the circular region bounded by the arc and the two radii at the ends of the arc together with the arc and the radii is called the sector of the circle.

$\bold\gray{Chord}$

A line segment whose end points lie on a circle is called a chord.

$\bold\gray{Semi-circle}$

The endpoints of a diameter of a circle divide the circle into two arcs is called a semi-circle.

$\bold{\boxed{\boxed{\sf{\green{Things \: To \:Remember}}}}}$

• A line segment whose end points lie on a circle is called a chord.
• Diameter = 2 × Radius.
• The whole arc of the circle is called circumference.
• Radius is also denoted as " r "
• A diameter is the longest chord of a circle. Clearly,an infinite number of diameters of a circle may be drawn.
• The two tangents drawn from a point outside the circle are equal in length.
• All radii of a circle are equal.