Question

Here are the shadows of some 3-D objects, when seen under the lamp of an overhead projector. Identify the solid(s) that match each shadow. (There may be many answers for these!)

Answer 1

Hint: Observe the shadows carefully. The circumference of the objects given in the question might resemble many objects in our daily life. Compare these shadows with the daily life objects carefully to get the results.

Complete step-by-step answer:
(i) First shadow is of a circle. Every circle has a radius. The distance between any point on the circle to its centre is always equal which is called radius.
Circle is in round shape. There are many objects/items in our daily life which are round in shape.
They are CD Disc, Cycle tire, Bottle cap, Wall clock, Tortilla, Cricket ball, Football, Plate, Sun, Moon etc.
(ii) Second shadow is of a square. A square has 4 sides. All sides of a square are equal.
There are many objects in our daily life which resemble a square.
They are Rubik’s cube, Chalk box, Bread, napkins, Chess board, drawing canvas etc.
(iii) Third shadow is a triangle. A triangle has 3 sides. The sum of interior angles of a triangle is 180 degrees.
There are many objects in our daily life which resemble a triangle.
They are Pyramids, Doritos, Mountains, Traffic signs, Pizza slices etc.
(iv) Fourth shadow is of a rectangle. A rectangle has 4 sides. Opposite sides of a rectangle are parallel and equal. A rectangle has a length and a breadth.
There are many objects in our daily life which resemble a rectangle.
They are TV and Computer screens, Currency notes, Windows, Doors, Cell Phone, A4 sheets, Books etc.

Note: : There are many geometric shapes. Each shape is different and unique and has unique properties for each. There are many types of triangles, Rhombus, parallelogram, Trapezium etc.