Question

find the length of the diagonal of a rectangle whose sides measure 15 cm and 20 cm.

Answer 1

Answer:

length of diagonal is 25 cm

Step-by-step explanation:

let ABCD is given rectangle

in triangle ABC

AB = 15,.BC = 20

AC is the diagonal

anglB is 90 °. ..( ANGLE OF RECTANGLE)

by Pythagoras theorem,

AC^2 = AB^2+ BC ^2

= 15^2+ 20^2

= 225+400

AC^2 = 625

AC= √625. ( taking square root)

AC = 25