What are the next two numbers in this pattern? 3, –9, 27, –81, . . .
2 answers:
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There is actually a cool trick to this. When you see a and 2a, in this case 6 and 12, then the small triangle is a 60-30-90 triangle. The remaining side is 
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This value rounds down to 10, and yep, you guessed it, another 30-60-90.
This time, x =
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This is a very difficult problem and requires knowledge of the special triangles. Hope this helps!
This value rounds down to 10, and yep, you guessed it, another 30-60-90.
This time, x =
This is a very difficult problem and requires knowledge of the special triangles. Hope this helps!