Question

3. The third side of a triangle measures (3x-5) cm. If the length of the midline is 14 m,

what is ?
A 8
C. 10
B. 9
D. 11

Answer 1

The correct answer is D, 11 cm.

Explanation:

Given that the third side of a triangle measures (3x-5) cm, if the length of the midline is 14 m, to determine the length of the third side and the correct option, the following calculations must be performed:

X (third side) = midline x 2

X = 14 x 2

X = 28

3X - 5 = 28

3X = 28 + 5

3X = 33

X = 33/3

X = 11

Therefore, the correct option is D: 11 cm.