Question

Find the semi perimeter of a triangle with sides 9cm 12 cm and 30 cm

Answer 1

Answer:

25.5 cm

Step-by-step explanation:

$s = \frac{a + b + c}{2}$

$= \frac{9 + 12 + 30}{2}cm \\ = \frac{51}{2}cm \\ 25.5cm$