Question

13. Two sides of a traingle are 5 cm and 4 cm. The
perimeter of the triangle is
12cm The third side
has length.
(a) 1 cm
(b) 2 cm
(c) 3 cm
(d) 6 cm​

Answer 1

Answer:

12-(5+4)=3 cm is the third length of the triangle so it is option c

Answer 2

Step-by-step explanation:

perimeter of triangle = sum of three sides

5 cm + 4 cm + n = 12 cm

9cm + n = 12 cm

n = 12 - 9

n = 3 cm