Question

Use the Pythagorean theorem to find the length of AC. Enter the answer in simplified form.

Need help ASAP!

Answer 1

Answer :

=> (AB)² + (AC)² = (BC) ²

=> (AC)² = (BC)² - (AB)²

=> (AC)² = (4√5)² - (2√5)²

=> (AC)² = 80 - 20

=> (AC)² = 60

=> AC = √60

=> AC = 2√15