alleryA wheel is 18 cm across through its centre. How long is its radius?
A36 cm
B9 cm
C18 cm
D6 cm
Answer & Solution
Correct answer: B. 9 cm
1. The radius is half the diameter.
2. 18 cm / 2 = 9 cm.
3. 36 cm would come from doubling instead of halving.
_Source: Wikipedia, Circle, Terminology_
Keep practising Basic Geometrical Ideas
Browse all Basic Geometrical Ideas questions for CTET, or explore more Mathematics topics.
Related questions
In strict maths, a circle is only the boundary of which region?A ring-shaped region between two circles with the same centre is called what?What is the point equally far from every point on a circle called?What do we call half of a circle cut along a diameter?A line that goes into a circle and out again at two points is named what?Touching a circle at just one point, a straight line is called what?The region cut off from a circle by one chord, along with its arc, has what name?A region bounded by two radii and an arc of a circle is called what?