If side P = 8cm, Q = 7cm and side R = 5cm. So the area of the triangle is?

[reisara]

If side P = 8cm, Q = 7cm and side R = 5cm. So the area of the triangle is?

 

[Dr.Peterson]

Look up Heron's Formula.

If you can't use that, you could use trigonometry to find an angle, and use that to find the area.