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Anonymous asked in Science & MathematicsMathematics · 1 month ago

im confused about this math?

Attachment image

3 Answers

  • ?
    Lv 7
    1 month ago

    Complete the large rectangle. Then Cos 30 = a/2√3 etc.

  • 1 month ago


    1) Draw an altitude to make a 30-60-90 triangle on the left and a rectangle on the right.

    2) Remember that a 30-60-90 triangle has sides in the ratio of:

    (short leg) : (hypotenuse) : (long leg) = 1 : 2 : √3

    In your triangle, the long leg is double that, so now you can double all the other sides:

    2 : 4 : 2√3

    Reading directly from the ratios, you can determine the hypotenuse a = 4.

    3) You can also figure out the short leg. Subtract it from 5 to get the length of b.

    b = 5 - (short leg)

    I'd help you further if you weren't posting anonymously, but I think you can figure out the last part on your own, right?

  • ?
    Lv 7
    1 month ago

    Well, just DRAW a line or two onto the figure, so as to make a triangle and a rectangle. 

    Upload your drawn pic and then we will take it from there. 

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