Question

Perimeter of a triangle is 27 cm if two sides measure 9cm and7.8cm find the measure of third side

Answer 1

10.2cm

Explanation:

9+7.8= 16.8cm

27-16.8= 10.2 cm

Answer 2

perimeter = sum of all sides

27 = 9+7.8+x

x (third side) = 10.2