Trigonometry 7th Edition

We will use given data about triangle ABC & Pythagoras Theorem to solve for 'b'- We know that - $c^{2} =a^{2} + b^{2}$ ( Pythagoras Theorem) Therefore - $b^{2} =c^{2} - a^{2}$ $b^{2} = (17)^{2} - (8)^{2}$ $b^{2} = 289 - 64$ $b^{2} = 225$ therefore $b = \sqrt (225)$ b = 15