Question

Triangle PQR is a right angled at vertex R. Calculate the length of side PR, if PQ=25 cm and QR = 20 cm.​

Answer 1

$answer$

hypotenuse ² = perpendicular ² + base ²

25²=20²+x²

625=400+x²

x²=625-400

x²=225

√225=15cm

so x= 15