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Question

# Fill in the blanks. (i) A triangle has ...... sides, ...... angles and ...... vertices. (ii) The sum of the angles of a triangle is ...... . (iii) The sides of a scalene triangle are of ....... lengths. (iv) Each angle of an equilateral triangle measures ...... . (v) The angles opposite to equal sides of an isosceles triangle are ....... . (vi) The sum of the lengths of the sides of a triangle is called its .......... .

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Solution

## (i) A triangle has 3 sides 3 angles and 3 vertices. (ii) The sum of the angles of a triangle is 180o. (iii) The sides of a scalene triangle are of different lengths. (iv) Each angle of an equilateral triangle measures 60o. (v) The angles opposite to equal sides of an isosceles triangle are equal. (vi) The sum of the lengths of the sides of a triangle is called its perimeter.

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