Sebuah lingkaran memiliki Diameter 28 cm dengan besar derajat juring 45° dan besar sudut juring 120° Carilah!a. luas lingkaranb. keliling lingkaran c. luas juringd. luas busurbisa pakai 22/7
Answer (4)
To find the simplest form, first multiply by integers, starting with 1, then 2, then 3, and so on until the multiplication yield a whole number.
For instance: 0.25 1 = 0.25 0.25 2 = 0.5 0.25 3 = 0.75 0.25 4 = 1 the simplest form uses the denominator of 4 and a numerator of 1
following the same procedure: 2.3 1 = 2.3 2.3 2 = 4.6 etc.... 2.3*10 = 23 denominator is 10 and numerator is 23
Answers:
1/4
23/10
The decimal 0.25 can be converted to the fraction 4 1 , and 2.3 can be expressed as 10 23 . Both of these fractions are in their simplest forms. Understanding how to convert decimals to fractions involves recognizing place values and simplification.
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Materi : LingkaranLuas Lingkaran L = πr²L = 22/7 . 14 . 14L = 22 . 2 . 14L = 44 . 14L = 616 cm²Keliling Lingkaran K = πdK = 22/7 . 28K = 22 . 4K = 88 cmLuas Juring L = L[lingkaran] × a/360° L = 616 cm² . 45°/360°L = 616 cm² . ⅛L = 77 cm²Keliling Juring K = K[ lingkaran ] × a/360°K = 88 cm . 45°/360°K = 88 cm . ⅛K = 11 cm---Semoga bisa membantu [tex] \boxed{ \colorbox{darkblue}{ \sf{ \color{lightblue}{ answered\:by\:BLUEBRAXGEOMETRY}}}} [/tex]
lingkarand = 28 cmluas lingkaran= 1/4 πd²= 1/4 × 22/7 × 28 × 28= 22 × 28= 616 cm²keliling lingkaran= πd= 22/7 × 28= 22 × 4= 88 cm45°/360° = luas juring 45°/luas lingkaran1/8 = luas juring 45°/616luas juring 45° = 616/8 = 77 cm²120°/360° = luas juring 120°/luas lingkaran1/3 = luas juring 130°/616luas juring 120° = 616/3 ≈ 205,33 cm²panjang busur 45°= 45°/360° × keliling lingkaran= 1/8 × 88= 11 cmpanjang busur 120°= 120°/360° × 88= 1/3 × 88= 29 1/3 ≈ 29,33 cm
