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The angles in a right angled isosceles triangle are:

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answer is C.

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Detailed Solution

Concept: Using the idea that equal sides also have equal angles in this problem since the triangle is isosceles, meaning that the lengths of the two sides must be the same.
Let

be an isosceles triangle with a right angle at B.

We also know that two angles in an isosceles triangle must be equal for AB = BC.
Let,

(opposite angles are equal)

(Angle sum property)
Question Image

Thus the angles are

Hence, the correct option is 3.

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