Answer:
8.106
Explanation:
Use Pythagorean Theorum for this question, a^2+b^2=c^2
If you put the numbers into the equation you get 6.3^2+5.1^2=c^2.
Simplify and get 65.7=c^2
To get rid of the square, you square root both sides, which will get you 8.106=c (since the answer wants round to 3 numbers behind the decimal point)
Therefore the missing length is 8.106cm. (For estimation just write a random number you think it would be before actually solving the problem.
Answer for #2:
Right Triangle
Not Right Triangle
Not Right Triangle
Right Triangle
Not Right Triangle
Explanation:
Just use the pythagorean thereum for each of the questions to see if the values match up