Question

find the semi perimeter of a triangle of side measure Acm, Bcm and Ccm respectively ​

Answer 1

Answer:

semi perimeter=p/2

Step-by-step explanation:

p=a+b+c

s=a+b+c/2

Answer 2

Answer:

Given s–a=. 8cm....(1)

s—b=7 cm....(2)

s—c=5cm....(3)

where ABC are sides of triangle is semi perimeter ies=a+b+c/2

(1)+(2)+(3)

= 3s-(a+b+c)=20cm

= 3s-(25)=20cm

= s= 20cm

area of triangle=s(s-a) (s-b) (s-c) = 20(8×7×5)=5600=20 14=59cm