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Grade - 2 Subject - Mathematics Unit - Geometry Topic - Geometrical shapes

Grade - 2 Subject - Mathematics Unit - Geometry Topic - Geometrical shapes School – Army School Roorkee Prepared by Mrs. Ranjana. Major Concepts Develop understanding and appreciation of geometrical shapes and their characteristic. Develop and exhibit creativity.

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Grade - 2 Subject - Mathematics Unit - Geometry Topic - Geometrical shapes

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  1. Grade - 2 Subject - Mathematics Unit - Geometry Topic - Geometrical shapes School – Army School Roorkee Prepared by Mrs. Ranjana

  2. Major Concepts • Develop understanding and appreciation of geometrical shapes and their characteristic. • Develop and exhibit creativity. • Develop power of thinking and reasoning. • Develop scientific temper. • ; • ;

  3. Minor Concepts: • Students will be able to recognized different geometrical shapes. • Students will be able to relate various shapes like that of bangle, cart,cone,box etc with circle,triangle,quadrilateral etc.

  4. Menu: • Contents • Quiz

  5. Contents: • Polygon • Triangle • Quadrilateral • Circle : Parts of a circle • Radius • Diameter • Chord • Circumference

  6. Polygon : • A simple closed figures by joining three or more line segments is called polygon Lets study about types of polygons

  7. Triangle : It is a closed figure formed by joining three line segments . So , a triangle is a polygon . Different shapes of triangle are shown below: The three line segments which form the triangle are called its sides .

  8. Quadrilateral : • It is a closed figure formed by joining four line segments called quadrilateral. So quadrilateral is a polygon. Different shapes of quadrilateral are shown below: • The four line segments which form a quadrilateral are called its sides.

  9. Circle : A closed curve formed in such a way that any point on this curve is equidistant from a fixed point which is in the interior of the curve. A B O o C D OA = OB = OC = OD

  10. Parts of a circle : • Center • Radius • Diameter • Chord • Circumference

  11. Center: • A fixed point in the interior of circle whose distance from all the points on the circle is same. B C O D A OA = OB = OC = OD

  12. Radius: • The distance between the center and any point on the circle is called the radius of the circle. O A AAAA A

  13. Diameter : • The line which passes through the center and meet any two points on the circle is called the diameter. O A B A diameter is twice the length of radius.

  14. Chord: • The line which meet at any two points on the circle . • A diameter is the longest chord of a circle. • CD is the chord of the circle. D C O o A B

  15. Circumference : • Length of a closed curve forming the boundary of the circle is called the circumference of the circle.

  16. Happy Reading

  17. Quiz: Well now its time to test those grey cells of yours!So all the best and happy clicking! SCORING: 10 correct: Excellent 8-7 correct: Very good 5-7correct: good 3-4 correct:Fair 0-2 correct:poor

  18. Q1:A circle is a: (1)Simple close curve (2)Open curve Q2:A chord that goes through the center of the circle: (1)Chord (2)Diameter

  19. Q3:A line that run between the circle and its center: (1)Radius (2)Diameter Q4:A line segments that join two points on the circle: (1)Chord (2)Diameter

  20. Q5:The distance round the circle is called as: (1)Circumference (2)Chord Q6:Can a circle have more than one center: (1)No (2)Yes

  21. Q7:Diameter is a: (1)Twice of a radius (2)Half of a radius Q8:If the radius of the circle is6cm ,then its diameter is: (1)12cm (2)6cm

  22. Q9:If diameter of the circle is 12cm, then its radius is: (1)12cm (2)6cm Q10:If radius of the circle 4cm, then its diameter is (1)8cm (2)4cm

  23. WELLDONE!CORRECT ANSWER! Now for the next question click on the next question.

  24. SORRY ! INCORRECT ANSWER! Better luck next time.

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