1. a circle has a circumfrance 88cm find its radius 2.a sector with angle 45 degrees has ab arc length 44cm find it radius and perimet

Question

1. a circle has a circumfrance 88cm find its radius
2.a sector with angle 45 degrees has ab arc length 44cm find it radius and perimeter speratly
pls answer asap i will give u the brainliest

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King 3 years 2021-09-04T16:17:03+00:00 1 Answers 4 views 0

Answers ( )

  1. ThanhThu
    0
    2021-09-04T16:18:36+00:00
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    Step-by-step explanation:

    Number 1

    Circumference = 88cm

    Circumference = 2πr

    2πr = 88

    πr = 88/2

    πr = 44

    22r/7 = 44

    22r = (44 × 7)

    r = (44 × 7)/22

    r = 2 × 7

    r = 14cm

    Number 2

    Length of arc = 44cm

    Angle = 45°

    L = ∅/360 × 2πr

    44 = 45/360 × 2πr

    44 = ⅛ × 2πr

    44 = ¼ × πr

    πr = 44 × 4

    22r/7 = (44 × 4)

    22r = (44 × 4 × 7)

    r = (44 × 4 × 7)/22

    r = 2 × 4 × 7

    r = 2 × 28

    r = 56cm

    Perimeter = L + 2r

    P = 44cm + 2(56cm)

    P = 44cm + 112cm

    P = 156cm

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )