The area of a circle with radius r is given by A = π r2. Find the area of a circle with radius 7 centimeters. Use 3.14 for π.

Question

The area of a circle with radius r is given by A = π r2. Find the area of a circle with radius 7 centimeters. Use 3.14 for π.

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Ivy 1 week 2021-10-09T19:48:59+00:00 2 Answers 0

Answers ( )

    0
    2021-10-09T19:50:06+00:00

    Answer:

    43.96 cm^{2}

    Step-by-step explanation:

    So we have the radius (r)

    r = 7 cm

    We have the area formula,

    A=2\pi r

    Substitute,

    A=2(3.14)(7)\\A=6.28(7)\\\\A=43.96 cm^{2}

    0
    2021-10-09T19:50:47+00:00

    Answer:

    The area is 0.015m²

    Step-by-step explanation:

    Step one

    Given that the expression for area of the circle is A = π r²

    Step two

    Now our raduis r= 7cm – – – meter =7/100= 0.07

    And Pi = 3.142

    Step three

    Substituting r in the formula for area we have

    A= 3.142*(0.07)²

    A=3.142*0.0049

    A= 0.015m²

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