Respuesta :

Area of whole

  • π(4)²
  • 16πin²

Area of inner circle

  • 2²π
  • 4πunits²

Area of shaded region

  • 16π-4π
  • 12πunits²
  • 37.68units²

#14

Area of circle

  • π(13)²
  • 169π

Area of shaded regions

  • 3/8×169π
  • 63.375π
  • 198.9975in²

#15

Area of square

  • 10²
  • 100cm²

Area of circle

  • π(10/2)²
  • 5²π
  • 25π
  • 78.5cm²

Area of shaded region

  • 100-78.5
  • 21.5cm²
MisterPantas

Area

Find the Area of shaded figure.

Solution:

Problem 13.

  • A = π r²
  • AB= π (2inch)²
  • A = 2 x 2
  • A = 4inch π
  • As = π(4inch)
  • A = 4 x 4
  • A = 16inch
  • A = 4inch x 3.14 = 12.56
  • A = 16inch x 3.14 = 50.24
  • A = 50.24 - 12.56
  • A = 37.68units²

Problem 14.

  • A = Radius ,13²
  • A = (3.14)
  • A = 13 x 13
  • A = 169π
  • A = 3/8 x 169 π
  • A = 3 × 169
  • A = 507
  • A = 507 ÷ 8
  • A = 63.375π
  • A = 63.375 x 3.14
  • A = 198.9975 inch²

Problem 15.

  • A = π r²
  • A = 10cm
  • A = 10cm x 10cm
  • A = 100cm²
  • A = 100 cm² - 78.5
  • A = 21.5cm²

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