We know that, In a Right Angled Triangle :
✿ (Hypotenuse)² = (First Leg)² + (Second Leg)²
From the Diagram :
✿ Hypotenuse = x
✿ First Leg 
✿ Second Leg 




The correct answers are A. 2x= 40 and D. 4x= 80~
A. 2*20= 40
D. 4*20= 80
Hope this helps~
Answer:
If you meant what is 1/10 of 80 the answer is 80
Step-by-step explanation:
0.8888 rounded to one significant figure is 0.9
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