Question

Find the length of the third side. If necessary, round to the nearest tenth.

Answer 1

Answer:

Your answer is 15.2

Step-by-step explanation:

use the formula a² + b² = c²

In this case, you know what a and c are.

a = 13

c = 20

Put those two into the formula.

13² + b² = 20²

13² = 169

20² = 400

169 + b² = 400

Bring 169 over to the other side to get b² by itself. do this by subtracting it from 400.

400 - 169 = 231

b² = 231

Now we need to get rid of the exponent. To do this, get the square root of both sides.

√b² = √231

b = 15.1986841536...

Finally, round your answer to the nearest tenth like the question tells you to.

15.2

Therefore:

b = 15.2