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Question

Which of the following can be classified as right angled triangles?

A
1=45; 2=45; 3=90
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B
1=25; 2=45; 3=110
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C
1=50; 2=45; 3=90
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D
1=50; 2=90; 3=40
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Solution

The correct options are
A 1=45; 2=45; 3=90
D 1=50; 2=90; 3=40
A right angled triangle is a triangle where one of the three angles measures 90.
Also sum of interior angles of a triangle = 180

In 1=25; 2=45; 3=110: No angle measures 90, hence it is not a right angled triangle.

In 1=50; 2=45; 3=90: Sum of angles = 185. Hence, such a triangle is not possible.

1=45; 2=45; 3=90 and
1=50; 2=90; 3=40
qualify as right angled triangles.


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