Question

5. Find the length of the diagonal of a rectangle whose sides are 15 cm and 8 cm.​

Answer 1

Answer:

$\sqrt{15 {}^{2} + 8 {}^{2} } \\ \sqrt{225 + 64 \ } \\ \sqrt{289 } \\ 17 \\ \\ hence \:the \: length \: of \: \: the \: diagonal \: is \: 17cm$

Answer 2

Answer

diagonal of a rectangle divides rectangle into 2 triangles

therefore root 15 ² +8 ²  is the diagonal

root 289

=17

measure of diagonal is 17cm