Question

In triangle pqr ,pq=8 cm,qr=4cm,pl=5cm.find the area of triangle pqr and am

Answer 1

Answer:

area of triangle=3/4√119cm²

Step-by-step explanation:

let PQ=a=8cm

    QR=b=4cm

    PR=C=5cm

s=(a+b+c)/2

s=(8+4+5)/2

s=17/2

by using heron's formula

area of Δ=√s(s-a)(s-b)(s-c)

              =√17/2(17/2-8)(17/2-4)(17/2-5)

              =√17/2×1/2×9/2×7/2

              =3/4√119cm²