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17e class 6 icse

 


1. Fill in the blanks:

(i) All the radii of a circle are equal. (ii) The distance around a circle is called the circumference. (iii) Any part of a circle is called an arc. (iv) The radius of a circle is half of its diameter. (v) The mid-point of a diameter is the center of the circle.

2. Write 'T' for true or 'F' for false:

(i) F (The line segment joining two points on a circle is called a chord, not an arc.) (ii) T (All diameters are chords.) (iii) F (A circle has an infinite number of radii.) (iv) F (The area lying between two radii is a sector, not a tangent.) (v) T (Twice a circle is a semicircle.)

3. From the given figure, identify the following:

(i) OA is a radius. (ii) AB is a diameter. ((ii) APB is a semicircle. (iv) O is the center. (v) AP is a segment. (vi) OAP is a sector.

4. O is the center of the two circles in the figure drawn below. Fill in the blanks for the following:

(i) OA, OB are radii of the inner circle. (ii) OP, OB, OA are the radii of the outer circle. (iii) DE is a chord of the outer circle. (iv) AB is a diameter of the inner circle. (v) The two circles are called concentric circles. (vi) DME is a sector. (vii) ANB is a semicircle.

5. Multiple Choice Questions (MCQs):

  1. (a) diameter (Double the radius of the circle is the diameter.)
  2. (c) quadrant (One-fourth of the region of a circle is a quadrant.)
  3. (b) concentric circles (Two or more circles with the same center are called concentric circles.)
  4. (b) book (A book is not an example of a circle.)
  5. (c) 4 cm (If the radius is 2 cm, the diameter is 4 cm.)

 

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