Question

find the area of the triangle whose sides are 16 cm,6 cm,and 18 cm.
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Answer 1

Answer:

1/2 × base × height

Step-by-step explanation:

1/2 × 6 × 18

= 54 square cm

Answer 2

Step-by-step explanation:

Here,

Let, a = 16 cm, b = 6 cm, c = 18 cm

So, semiperimeter (s) = a+b+c / 2

= 16 + 6 + 18 / 2

= 40 / 2

= 20 cm

Now, by heron's formula

Area of triangle = √ s* (s-a) (s-b) (s-c)

= √ 20* (20-16) (20-6) (20-18)

= √ 20*4*14*2

= √ 2*5*2*2*2*7*2*2

= 2*2*2 √ 5*7

= 8 √35 cm^2