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Question
The length of the sides of the triangle is given. Say what types of triangles they are 4.3 cm, 4.3 cm, 4.3 cm.
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Solution
All sides are equal.
Therefore, it is an equilateral triangle.
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Match the following:
| Column A | Column B |
| (i) No sides are equal | Isosceles triangle |
| (ii) One right angle | Scalene triangle |
| (iii) One obtuse angle | Right angled triangle |
| (iv) Two sides of equal length | Equilateral triangle |
| (v) All sides are equal | Obtuse angled triangle |
What is common in the following figure?
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| (i) | (ii) |
Is figure (i) that of triangle? if not, why?
Jincy used these shapes to make drawings of fish.

Now you also use some shapes to draw the different sea animals shown below.

Sea urchin

Lobster

Eel

Red snapper
Octopus

Clam

Parrotfish

Prawn

Cuttlefish

Jellyfish

Squid

Silver pomfret

Crab
Draw a rough sketch of a triangle ABC. Mark a point P in its interior and a point Q in its exterior. Is point A in its exterior or in its interior?


