We have the triangle 30° - 60° - 90°.
The lenght of the sides are in proportion: 

The answer is b. 2,8 and 3,11
8=3(2)+2
8=6+2
8=8
11=3(3)+2
11=9+2
11=11
Answer:
x=4
Step-by-step explanation:
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It would be the last one because 5 columns are shaded and there are 10 columns all together. 50/100= 0.5
Answer:
Step-by-step explanation: the answer is x^2+10x+21