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Verified answer
LingkaranPanjang busur = sudut pusat/360° x Keliling lingkaran
= 135/360 x 2 x π x r
= 3/8 x 2 x 3,14 x 12
= 3/4 x 3,14 x 12
= 3 x 3,14 x 3
= 28,26 cm
Luas juring = sudut pusat/360° x Luas lingkaran
= 135/360 x π x r x r
= 3/8 x 3,14 x 12 x 12
= 3/2 x 3,14 x 3 x 12
= 3 x 3,14 x 3 x 6
= 169,56 cm^2
*semoga membantu. sukses selalu ^_^