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