Question

Know
the concept of Pythagorean theorem?​

Answer 1

Step-by-step explanation:

Pythagorean theorem, the well-known geometric theorem that the sum of the squares on the legs of a right triangle is equal to the square on the hypotenuse (the side opposite the right angle)—or, in familiar algebraic notation, a2 + b2 = c2.

Answer 2

it is only used in right angled triangle.

Step-by-step explanation:

FOR RIGHT ANGLE TRIANGLE ABC

ANGLE B IS RIGHT ANGLE

SO AB^2=BC^2+AC^2