How do you solve this: in ? pqr, pq = 39 cm and pn is an altitude. find pr if qn = 36 cm and rn = 8 cm.

PR = 17 cm

Step-by-step explanation:

Given  :

In ΔPQR,

PQ = 39 cm

PN is an altitude.

QN = 36 cm

RN = 8 cm.

To Find : Length of PR

Solution :

Since we are given that PN is an altitude .

So, PN divides ΔPQR in two right angled triangles named as ΔPQN and ΔPRN. (Refer attached file)

So, first we find Length of PN in ΔPQN using Pythagoras theorem i.e.

Thus, Length of PN = 15cm

Now to find length of PR we will use Pythagoras theorem in ΔPRN.

Hence the length of PR = 17 cm

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315