Define each of the following:
(a) A scalene triangle
(b) An isosceles triangle
(c) An obtuse triangle

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Solution

(a) A triangle having no sides or angles equal is called a scalene triangle.

(b) A triangle having two sides and the corresponding opposite angles equal is called an isosceles triangle.

(c) A triangle having one of the angles more than 90 $°$ is called an obtuse triangle.

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