Tolong di jawab …..​

1. L.Juring = π.r².(m</360°)

78,5 cm² = 3,14.r².(90°/360)

100 cm² = r²

r = 10 cm (B)

2. K.Busur = π.2r.(m</360°)

22 cm. = ²²/7.2r.(120/360)

r = 10,5 ( jawaban tidak ada )

3. K. Busur = π.d.(m</360°)

16,5 = ²²/7.42.(m</360)

m< = 45° (A)

4. L.Juring = π.r².(m</360°)

57,75 cm = ²²/7.r².(60/360)

110,25. =r²

r = 10,5 cm (B)

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