Question

Solve the following equations by using Heron's formula:

1. The sides of a triangle are 70 cm, 80 cm and 90 cms. Find its area.
plz guys urgent​

Answer 1

Answer:

Given,

A=70cm

B=80cm

C=90cm

Semi-perimeter =

2

(70+80+90)

=

2

240

=120cm

Area of triangle =

s(s−a)(s−b)(s−c)

=

120(120−70)(120−80)(120−90)

=

120×50×40×30

=

4×3×10×5×10×3×10×4×10

=4×3×100

5

=1200×2.23

=1200×

100

223

=2676cm

2

∴ Area of triangle =2676cm

2

Answer 2

Answer:$6000\sqrt{2}$$cm^{2}$

Step-by-step explanation:

In the pic