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Classification of Triangles Based on Their Angles

Why is it cal...

Question

Why is it called a right angled triangle?

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Solution

It is called a right-angle triangle because one of the angles of the triangle is always $90 °$ and the angle between a pair of sides is equal to $90 °$ .

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Q. Fill in the blanks:

(i) A right triangle cannot have an ...... angle.
(ii) The acute angles of a right triangle are ...... .
(iii) Each acute angle of an isosceles right triangle measures ...... .
(iv) Each angle of an equilateral triangle measures ...... .
(v) The side opposite the right angle of a right triangle is called ...... .
(vi) The sum of the lengths of the sides of a triangle is called its...... .

Question 52

Fill in the blanks to make the statement true.

The longest side of a right-angled triangle is called its ___

The longest side of a right-angled triangle is called its ______.

Q. The longest side of the right angled triangle is called its

Q. A triangle whose........... angle(s) is

90^{o}

is called a right angled triangle.

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Classification of Triangles Based on Their Angles

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