Three sides of a triangle are, a, 3a, √10 a. Find the measurement of the angle opposite to the largest side
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Solution
We know that In a right triangle, the sum of the squares of the any two sides is equal to the the square of the third side. Observe that a²+(3a)² = (side)² ⇒ a²+9a² = (side)² ⇒10a² = (side)² side = √10 a
Therefore, the triangle is a right triangle.
The angle opposite to the the largest side is 90 degrees