Question

Find the length of a third side of a triangle given two sides.
please

Answer 1

Answer: # 4.) 9.4

#5.) 10.2 cm

#6.) 5 inches .

Step-by-step explanation: Assuming that a right triangle is expected, use the Pythagorean Theorem to calculate the third side: a² + b² = c²

`5^(2)+8^(2)=89` Then take the square root of 89. A calculator is handy for most of these!

√89 = 9.433981 . Round to 9.4

`2^(2)+10^(2)=104`

√104 = 10.1980 Round to 10.2 Remember to include the units, cm in the answer.

Memorize this one:

Given side lengths of 3 & 4, the hypotenuse is 5!

3² + 4² = 5² Called a "Pythagorean Triple"

9 + 16 = 25

The square on the hypotenuse is a perfect square of 5

No calculator necessary, and you are likely to see this ratio in other questions.