What cross-sections do you get when you give a:
(i) vertical cut (ii) horizontal cut to the following solids?
(a) A brick
(b) A round apple
(c) A die
(d) A circular pipe
(e) An ice-cream cone.
|S.No.||Name of article||Figure||Vertical cut||Horizontal|
|(b)||A round apple|
|(d)||A circular pipe|
|(e)||An ice-cream cone|
A bulb is kept burning just right above the following solids. Name the shape of the shadows obtained in each case. Attempt to give a rough sketch of the shadow.
(You may try to experiment first and then answer these questions).
|(ii)||A cylindrical pipe||Line|
Here are the shadows of some 3-D objects, when seen under the lamp of the overhead projector. Identify the solid (s) that match each shadow.
(There may be multiple answers for these!)
|S. No.||Shadow||Shape's Name||3-D objects|
|(i)||Circle||Chapatti, Football, Disc, Plate etc.|
|(ii)||Square||Die, Square paper sheet, cubical magic box, Chalk box etc.|
|(iii)||Triangle||Ice-cream cone, Birthday cap, etc.|
|(iv)||Rectangle||Geometry box, Book, Table etc.|
Examine if the following are true statements:
(i) The cube can cast a shadow in the shape of a rectangle.
(ii) The cube can cast a shadow in the shape of a hexagon.