Answer:The 45 45 90
Step-by-step explanation:
Theorem states that 45 45 90 special right traingles that have sides of which the lengths are in a special ratio of 1 : 1 : 2 1:1:/sqrt{2} 1:1:2 and two 4 5 45 45 angles and one right angle of 9 0 90 90.
