Question

Find the length a digonal of a rectangle having sides 11 cm and 60 cm.​

Answer 1

Answer: We know all angles of a rectangle are 90°

Thus we will use simply Pythagoras Theorem

let the length of the diagonal be x cm

Then

=> x = √11² + 60²

=> x = √121 + 3600

=> x = √3721

=> x = 61cm

Thus the length of the diagonal is 61cm

Answer 2

Answer:

To find the length of the diagonal of a rectangle, divide the figure into two triangles.

According to the Pythagoras Theorem in Triangle ABC:

AB²+BC²=AC²

Length²+Breadth²=Diagonal²

60²+11²=AC²

3600+121=AC²

3721=AC²

AC=√3721

AC=161 cm