if L = 8cm, B=6cm, how to find the length of the diagonal of a rectangle using pythagoras theorem pls?

The sides of rectangle are L = 8 cm B = 6 cm.

Since all angles of rectangle are 90o, then the figure formed by the diagonal and two sides of a rectangle will be a right angle triangle.

The as per Pythagoras theorem :

Hypotenuse² = Base² + Perpendicular²

Hypotenuse = √ Base² + Perpendicular²

Hypotenuse = √6² + 8² = √36 + 64 = √100 = 10 cm.

Ans: 10 cm.