Find the shaded area when?

Guys please help just No2 I need to sleep,I need to pass up tomorrow

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5 Answers

  • David
    Lv 7
    9 months ago
    Favourite answer

    2) Which is the shaded region the triangle or the circle?

    Area of the circle = pi times radius^2

    Area of the triangle = 0.5 times radius^2 times sine(of given angle)

    If the shaded area is the circle then it is: area of circle - area of triangle

  • 9 months ago

    I'm assuming the "shaded area" is the slice of pie for each case.  In which case:

    a) A = pi r^2 for the whole pie and a = theta/360 * A = 70/360*pi()*6^2 = 21.99 cm^2 ANS.

    b) = (104/360)*pi()*14^2 = 177.9 cm^2 ANS

    c) = (80/360)*pi()*5^2 = ?  ANS you can do the math.

  • Bryce
    Lv 7
    9 months ago

    2. a. area of sector= 70/360 * π*6² ≈ 21.99 cm²

    area of triangle= 6sin35° * 6cos35°≈ 16.91 cm²

    area below the triangle= 21.99 - 16.91= 5.08 cm²

  • Anonymous
    9 months ago

    It looks like the only shaded area is half of question 3.  Looks like a trick question.

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  • Anonymous
    9 months ago

    Easy.  Remember that 100% of the circle is 360 deg

    1. Calculate the total area, pi * radius^2

    2. Divide the angle of the area you want by 360 and then multiply by the area in 1.

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