Question

Find the length of the diagonal of a rectangle whose sides are 21 cm and 20 cm​

Answer 1

Answer:

29tep-by-step explanation:

Two right-angled triangle made their by diagonal and we can use pythagoras theorem to find out the diagonal

Answer 2

Answer: 29 cm

Step-by-step explanation:

We can use Pythagoras theorem: (all the angles in a rectangle is 90 degrees)

21^2 + 20^2 = diagonal^2

441 + 400 = 841

diagonal^2 = 841

diagonal = 29 cm