Loading...
GRE
GRE Quantitative Reasoning Section

Finding Length of Side BC in a Triangle

Hard Geometry Triangles

In triangle ABC, the length of side AB is 8 cm, and the length of side AC is 6 cm. If the angle A measures 60 degrees, determine the length of side BC using the Law of Cosines.

Using the Law of Cosines, the formula is given as:

$$ c^2 = a^2 + b^2 - 2ab imes ext{cos}( heta) $$

where $c$ is the side opposite angle $A$, and $a$ and $b$ are the lengths of the other two sides. Calculate the length of side BC, denoted as side $c$.

Hint

Submitted3.7K
Correct2.4K
% Correct66%