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Question

The angles in a right angled isosceles triangle are

A
90,30,60
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B
90,20,70
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C
90,40,50
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D
90,45,45
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Solution

The correct option is D 90,45,45
In geometry, an isosceles triangle is a triangle that has two sides of equal length and the angle opposite to the equal sides are also equal.
In right angled triangle one angle is 90 and hence,
From diagram,

2x+90=180

x= 45

the angles in a right angled isosceles triangle are 90,45,45.

380809_268570_ans_490fe3e008d54c55abe5794851c43b39.png

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