How many triangles do you have in your set? Are all of them equal in size? Find out. - Mathematics

How many triangles do you have in your set? Are all of them equal in size? Find out.

Answer in Brief

There are three triangles in a set. Only two out of the three are equal in size. We can check that by measuring the sides of the triangles.

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Shapes and Designs

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Chapter 5 Shapes and Designs
Tangram | Q 1. | Page 67

Looking at the picture given above, can you tell who is out?

Do the things with straight edges have corners?

Try to find things which have both straight and curved edges.

Take a rectangular sheet of paper.
Count its corners.
Now fold one of its corners.
a) How many corners does it have now?
b) How many corners will you get by folding
i) 2 corners
ii) 3 corners
iii) 4 corners
c) Can you fold this paper in such a way that it has only three corners? You are allowed only two folds.
What shape will you get?
Repeat the activity with a square sheet of paper.
Can you fold all the corners of the square sheet in such a way that the number of corners remains unchanged?

In the following figures, tick (√) those which have corners.