Question

find area if the measurement of 2 sides are 18 cm & 10 cm and perimeter is 42cm . use herons formula​

Answer 1

A=21V11 cm^2

Step-by-step explanation:

42-(18+10)=42-28=14 cm( the third side)

S=p/2=42/2=21cm

A^2=S(S-18)*(S-10)*(S-14)=21*3*11*7=21*21*11=21^2*11

A=V21^2*11=21V11 cm^

Answer 2

A=21V11 cm^2

Explanation:

42-(18+10)=42-28=14 cm( the third side)

S=p/2=42/2=21cm

A^2=S(S-18)*(S-10)*(S-14)=21*3*11*7=21*21*11=21^2*11

A=V21^2*11=21V11 cm^2