Question

the difference of semi perimeter and the sides of triangle ABC are 8cm 7cm and 5cm respectively find the perimeter of ABC​

Answer 1

Step-by-step explanation:

perimeter of triangle = a+b+c

therefore,perimeter ofABC=a+b+c

=8cm+7cm+5cm

=20cm

now,

semi perimeter=a+b+c /2

so, semi perimeter of ABC=8cm+7cm+5cm/2

=10cm

now, difference between perimeter of ABC and semi perimeter of ABC=20cm-10cm=10cm