Basic Geometrical Ideas
Exercise 4.6
Examples for Practice
1). From the figure, identify:
(a) the centre of the circle
O is the centre of the circle.
(b) three radii
Radius OA, OB, OC
(c) a diameter
AC is the diameter.
(d) a chord
ED is a chord. AC is also a chord.
(e)two points in the interior
O and P are the two points in the interior
(f) a point in the exterior
Q is a point in the exterior.
(g) a sector
AOB is a sector
(h) a segment
ED is a segment.
2)
(a) is every diameter of a circle also a chord?
Yes. The diameter is the longest chord of a circle.
(b) Is every chord of a circle also a diameter?
No.
3). Draw any circle and mark
(a) it’s centre
(b) a radius
(c) a diameter
(d) a sector
(e) a segment
(f) a point in its interior
(g) a point in its exterior
(h) an arc
4). Say true or false:
(a) Two diameters of a circle will necessarily intersect.
True.
(b) The centre of a circle is always in its interior.
True.
Click here for the solutions of
Chapter 4 Basic Geometrical Ideas
Chapter 3: Playing With Numbers
Chapter 2: Whole Numbers
Chapter 2: Knowing Our Numbers
