Answer:
Pretend that H is the midpoint of AB, connect O and H
=> OH is the median of ΔOAB
Since we know that OA = OB => ΔOAB is an isosceles triangle
=> OH is also the height of ΔOAB
=> ∠OBA = ∠OAB = (180° - ∠AOB)/2 = (180° - 120°)/2 = 60°/2 = 30°
Now look at ΔOHB (that you create by connecting O and H)
We have:
cos30° = BH/OB
=> BH = cos30° · OB = √3/2 · x = (√3 x)/2
Because we have H as the midpoint of AB, we know that:
AB = 2 · BH = 2 · (√3 x)/2 = √3 x
So the answer is B
Answer:
54
Step-by-step explanation:
15/5 = 3 columns in each row are shaded. There are 18 rows, so 3×18 = 54 cells are shaded.
The hardest math problem is solving life, I mean this because everyone is trying to make good decisions which means you never stop thinking through your whole day
The answer is
8x^4-10x^3-3x^2
Answer:
hope this helps
Step-by-step explanation:
