The measure of the third side of the triangle is 5.9cm
Let the sides of the triangles be a, b and c. The perimeter of the triangle will be expressed as:
Given the following parameters:
a = 6.3cm
b = 8.4cm
P = 20.6cm
c = t
Substitute the values into the formula:
20.6 = 6.3 + 8.4 + t
20.6 = 14.7 + t
t = 20.6 - 14.7
t = 5.9cm
Hence the measure of the third side of the triangle is 5.9cm
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