Materi : Lingkaran
L = a/360°( π . r² - π . r² )
L = 72°/360° . ( 22/7 . [ 21² - 7² ] )
L = ⅕ . ( 22/7 . [ 441 - 49 ] )
L = ⅕ . ( 22/7 . 392 )
L = ⅕ . ( 22 . 56 )
L = ⅕ . 1.232 cm²
L = 246,4 cm²
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[tex] \boxed{ \colorbox{darkblue}{ \sf{ \color{lightblue}{ answered\:by\: BLUEBRAXGEOMETRY}}}} [/tex]
LP :
= 72/360(22/7(21² - 7²)
= 72/360(22/7(441 - 49)
= 72/360(22/7(392)
= 72/360(22(392/7)
= 72/360(22(56)
= 72/360(1.232)
= 72(1.232)/360
= 88.704/360
= 246,4 cm²
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Materi : Lingkaran
L = a/360°( π . r² - π . r² )
L = 72°/360° . ( 22/7 . [ 21² - 7² ] )
L = ⅕ . ( 22/7 . [ 441 - 49 ] )
L = ⅕ . ( 22/7 . 392 )
L = ⅕ . ( 22 . 56 )
L = ⅕ . 1.232 cm²
L = 246,4 cm²
Semoga bisa membantu
[tex] \boxed{ \colorbox{darkblue}{ \sf{ \color{lightblue}{ answered\:by\: BLUEBRAXGEOMETRY}}}} [/tex]
LP :
= 72/360(22/7(21² - 7²)
= 72/360(22/7(441 - 49)
= 72/360(22/7(392)
= 72/360(22(392/7)
= 72/360(22(56)
= 72/360(1.232)
= 72(1.232)/360
= 88.704/360
= 246,4 cm²