Not so sure what to do....

Question

Open- ended: A triangle has sides with lengths of 9 and 12. Give a possible length for the third side so the triangle can be classified in each of the following ways:

Obtuse Acute and Right

I know the answer for the right angle 9,12, 15 just not the Obtuse or Acute.

Answer 1

Hi Bella,

if c^2 =a^2+b^2, the triangle is right triangle

if c^2 > a^2+b^2, the triangle is obtuse

if c^2 < a^2+b^2, the triangle is acute

hope this helps you find the measure of the third side