The answer to that would be 2.25 An easy calculator on your phone can also solve that if you didn’t know :)
Answer:
x=19.4
Step-by-step explanation:
a^2+b^2=c^2
x^2+8^2=21^2
x^2+64=441
x^2=377
square root of 377 is 19.41648784
rounded would be 19.4
<u><em>Answer:</em></u>
a = 3 ft
<u><em>Explanation:</em></u>
The relation between the legs and the hypotenuse of a right-angled triangle can be expressed using the Pythagorean theorem as follows:

<u>In the given triangle, we have:</u>
leg1 = 8 ft and hypotenuse =
ft
<u>Substitute with the givens in the above equation to get the length of the second leg as follows:</u>
(
)² = (8)² + (second leg)²
73 = 64 + (second leg)²
(second leg)² = 9
either second leg = 
or second leg =
as length cannot be negative
Hope this helps :)
Answer:b
Step-by-step explanation: use pemdas