Jawaban:
L : 99cm²
K : 98,97cm²
Maaf kalau salah. Cara menghitung luas nya ada di bawah, untuk cara menghitung keliling nya ada di foto
Materi : Lingkaran
L = ½ . π . r² + ½ . π . (½r)²
L = ½ . 22/7 . 21² + ½ . 22/7 . (21/2)²
L = ½ . 22 . 3 . 21 + ½ . 22 . 3/2 . 21/2
L = 11 . 63 + 11 . 63/4
L = 11 . ( 63 + 63/4 )
L = 11 . ( 252 + 63 )/4
L = 11 . 315/4 cm²
L = 11 . 78,75 cm²
L = 866,25 cm²
K = ½πd + ½π(½d) + (½d)
K = ½ . 22/7 . 21 + ½ . 22/7 . 21/2 + 21/2
K = 11 . 3 + 11 . 3/2 + 10,5
K = 33 + 33/2 + 10,5
K = 43,5 + 16,5
K = 60 cm
Semoga bisa membantu
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Jawaban:
L : 99cm²
K : 98,97cm²
Maaf kalau salah. Cara menghitung luas nya ada di bawah, untuk cara menghitung keliling nya ada di foto
Materi : Lingkaran
Luas
L = ½ . π . r² + ½ . π . (½r)²
L = ½ . 22/7 . 21² + ½ . 22/7 . (21/2)²
L = ½ . 22 . 3 . 21 + ½ . 22 . 3/2 . 21/2
L = 11 . 63 + 11 . 63/4
L = 11 . ( 63 + 63/4 )
L = 11 . ( 252 + 63 )/4
L = 11 . 315/4 cm²
L = 11 . 78,75 cm²
L = 866,25 cm²
Keliling
K = ½πd + ½π(½d) + (½d)
K = ½ . 22/7 . 21 + ½ . 22/7 . 21/2 + 21/2
K = 11 . 3 + 11 . 3/2 + 10,5
K = 33 + 33/2 + 10,5
K = 43,5 + 16,5
K = 60 cm
Semoga bisa membantu
[tex] \boxed{ \colorbox{darkblue}{ \sf{ \color{lightblue}{ answered\:by\: BLUEBRAXGEOMETRY}}}} [/tex]