# A triangle has sides of lengths 4, 3, and 5 is it a right triangle?

##### 2 Answers

Jun 12, 2015

#### Answer:

Yes, it is.

#### Explanation:

Use the Pythagorean Rule to check;

25 = 9 + 16 . OK

Jun 12, 2015

Let's see. Let's use the **Law of Cosines** to check by solving for an angle or two.

Therefore, with