Question

ln ∆ LMN, l =5, m = 3 , n = 12 State with the reason ∆ LMN is a right angled triangle or not​

Answer 1

Answer:

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Given: A ALMN, in which, LM = 5 units, MN = 13 units, NL = 12 units

To Find: Whether it is a right angled triangle

or not.

O In a right angled triangle, Sum of the squares of perpendicular and base is equal to the hypotenuse.

* (Perpendicular)2 + (Base)2 = (Hypotenuse)²

Here

Perpendicular = 12 units

• Base = 5 units

Hypotenuse = 13 units

Put the values in the formula and solve.

50%

:⇒ P² + B² = H²

=>

(12)² + (5)² = (13)²

144 25 169

169 169 ★ =

... Hence, triangle LMN is a right angled triangle

hope it will help you