How to prove that this triangle is right-angled?
Letters a, b and c are for the angles of a triangle.
How to prove that
if #cot(a/2) = (sinb + sinc)/(sin a)# , than is the triangle right-angled
Letters a, b and c are for the angles of a triangle.
How to prove that
if
2 Answers
If you have all three side lengths, to be right angled the triangle must obey Pythagorus's theorem.
Explanation:
eg.
if triangle has side lengths of 3, 4 and 5;
Hence triangle is right angled.
If however, the triangle has side lengths of 3, 4 and 6;
and triangle is NOT right angled.
Hope it helps :)
Kindly refer to a Proof given in the Explanation.
Explanation:
Given
Also, we know that,
Now,
Taking into a/c that
This proves that