Question

Look at this triangle.
B
13 cm
A
8 cm
Work out length BC.

Answer 1

Using the Pythagorean theorem:

BC = sqrt(13^2 - 8^2)

BC - sqrt(169 - 64)

BC = sqrt(105)

The exact dimension is sqrt105

If it needs be be in decimal format, sqrt(105) = 10.24695