Question

Triangle ABC below has a right angle C and a hight CD. If AC is 3 units long and BC is 4 units long, what is the length of AB?

Answer 1

AB = 5

Explanation:

Pythagorean theorem: a² + b² = c²

=> 3² + 4² = AB²

=> AB =
`\sqrt{3^(2)+4^(2) }`

=> AB = 5