Given that the diameter of a circle is 14cm and using pie = 22/7, then the circumference of the circle is:
22 cm.
154 cm.
44 cm.
77 cm.
A polygon having nine sides is called:
Octagon.
Decagon.
Nonagon.
Heptagon.
Given the formula A = πr², expressing r in terms of A and π gives:
√A / π.
A/π.
A / √π².
√(A/π).
The distance from the centre of a circle to point on the circumference is called:
A chord.
An arc.
A diameter.
Radius.
Given that π = 22/7 and the radius of a circle is 7 cm, then the area of the circle is:
154 cm².
308 cm².
22 cm².
44 cm².
