Subject :IMO Class : Class 7
In a ΔABC, if AB + BC = 10 cm, BC + CA = 12 cm, CA + AB = 16 cm, then the perimeter of the triangle is ______.
A 19 cm
B 17 cm
C 28 cm
D 22 cm
It is given that, AB BC = 10 cm ...(i) BC CA = 12 cm ...(ii) CA AB = 16 cm ...(iii) Adding (i), (ii) and (iii); we get, 2(AB BC CA) = 10 12 16 â AB BC CA = 19 cm.
Ans 1:
Class : Class 7
thanks
Ans 2:
Class : Class 8
It is given that, AB BC = 10 cm ...(i) BC CA = 12 cm ...(ii) CA AB = 16 cm ...(iii) Adding (i), (ii) and (iii); we get, 2(AB BC CA) = 10 12 16 â AB BC CA = 19 cm.