Question

8. If the sides of a triangle are in the ratio
1: 2: 1, show that it is a right-angled
triangle.
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Answer 1

Answer:

let the nagles be x,2x andx respectievly

so,we know that sum of all angle in a triangle is 180°

x+2x+x=180

4x=180

x=45degree

2x=2×45

=90°so the triangle is a right angled triangle