Question

find the area of a triangle two sides of which are 18 cm and 10 cm and the perimeter is 42 CM ​

Answer 1

14cm

Step-by-step explanation:

perimeter= sum of all sides

let the third side be x

perimeter=18cm+10cm+x

42=28+x

42-28=x

x=14cm

Answer 2

Answer:

this is the ans by herones formula