Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Anonymous
Anonymous asked in Science & MathematicsMathematics · 1 month ago

im confused about this math?

Attachment image

3 Answers

Relevance
  • ?
    Lv 7
    1 month ago

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

  • 1 month ago

    Steps:

    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. 

Still have questions? Get your answers by asking now.