KnowledgeBoat Logo

Mathematics

The hypotenuse of a right triangle is 6 m more than twice the shortest side. If the third side is 2m less than the hypotenuse, find the sides of the triangle.

Pythagoras Theorem

25 Likes

Answer

Let the shortest side be x meters.

Hypotenuse = 2x + 6 meters

Third side = 2x + 6 - 2 = 2x + 4 meters.

Since, the sides are of a right triangle.

By pythagoras theorem,

⇒ (Hypotenuse)2 = (First Side)2 + (Second side)2

⇒ (2x + 6)2 = (x)2 + (2x + 4)2

⇒ 4x2 + 36 + 24x = x2 + 4x2 + 16 + 16x

⇒ 4x2 + 36 + 24x = 5x2 + 16 + 16x

⇒ 5x2 - 4x2 + 16x - 24x + 16 - 36 = 0

⇒ x2 - 8x - 20 = 0

⇒ x2 - 10x + 2x - 20 = 0

⇒ x(x - 10) + 2(x - 10) = 0

⇒ (x + 2)(x - 10) = 0

⇒ x = -2 or x = 10.

Since, side cannot be negative,

x ≠ -2.

Shortest side = 10 m

Hypotenuse = 2x + 6 = 2(10) + 6 = 26 m

Third side = 2x + 4 = 2(10) + 6 = 24 m.

Hence, sides of triangle = 10 m, 24 m and 26 m.

Answered By

17 Likes


Related Questions