Two sides of a triangle measures 20 cm in 30 cm which of the following could be the measure of the third side

130

Step-by-step explanation:

Triangles must always add up to 180.

20+30=50

180-50=130

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.