Question

Solve for the length of BC

Answer 1

BC= 9cm

Explanation:

• You'll need to use the Pythagorean theorem:

a^2 + b^2 = c^2

• 12^2 + b^2 = 15^2

The slanted side of the triangle is always going to be 'c' because it is the longest side of the triangle.

• Now simplify: 144 + b^2 = 225

I got these numbers because 12^2= 144 and 15^2= 225

• Subtract. 225 - 144 = 81

• Now find the square root of 81. The answer is 9.