Question

Find the perimeter of a rectangle whose lenght is 10cm and diagonal is 26 cm.

Answer 1

Answer:

${\huge{\fcolorbox{red}{black}{\orange{\boxed{\boxed{\boxed{\boxed{\underbrace{\overbrace{\mathfrak{\orange{\fcolorbox{red}{purple}{answer}}}}}}}}}}}}}$

Using the formulas

P=2(l+w)

d=w2+l2

Solving forP

P=2l+2d2﹣l2=2·10+2·262﹣102=68cm