Question

a triangle with the side 8cm 10 cm and 12 cm​

Answer 1

Answer:

it is a scalene triangle

Step-by-step explanation:

I hope this may help you

Answer 2

$\sf \Large Solution!!$

Sides = 8 cm, 10 cm and 12 cm

Perimeter = Sum of all sides

Perimeter = 8 cm + 10 cm + 12 cm

Perimeter = 30 cm

Semi-perimeter (s) = Perimeter ÷ 2

s = 30 cm ÷ 2

s = 15 cm