The 30/60/90 right triangle is the biggest cliche in trig. We recall the sides come in ratio 

First x:


Next y:


Choice C
Answer:
the area is six units squared
Answer:
Concept: Algebraic Analysis

- Those two symbols indicate one solution

- Those symbols indicate a range of values

- Indicates two bounded answers
- In an inequality there is always a solution
Answer:
20 feet
Step-by-step explanation:
1st piece = x
2nd piece = 2x
3rd piece = 6x
x+2x+6x=180
9x=180
x=20
so the first piece is 20 feet, the second is 40, and the third is 120.