4th from the top: 1/2base x height
FIRST PROBLEM AS GENIUS!!!
The 45-45-90 triangle theorem states that each leg equals x, and the hypotenuse equals

. Using this, we can find that the height is 10. Take the average of the lengths to get l = 27.
The area = 270.
Answer: 10/3
Step-by-step explanation:
Look at attachment
Answer:
r = 2
Step-by-step explanation:
(2-3)/(6-5)
= -1/1
= -1