Question

Find the third side and semi-perimeter of a triangle whose two sides are 18cm and 10cm

and the perimeter is 42cm.​

Answer 1

Answer:

a=14cm

b Base

18

cm

c Side

10

cm

P Perimeter

42

cm

Answer 2

Step-by-step explanation:

perimeter = 42cm

let the third side be x

x+ 18+10=42cm

x+28=42cm

x= 42-28cm

x= 14cm

semiperimeter = perimeter/2=42/2=21cm