jawab no 4 besok di kumpul

a. jari-jari lingkaran
= 1/2 × (LP + NP)
= 1/2 × (4 + 16)
= 1/2 × 20
= 10 cm

b. apotema
= panjang jari-jari - LP
= 10 - 4
= 6 cm

c.
KP = PM
(KP)^2 = (jari-jari)^2 - (apotema)^2
(KP)^2 = (10)^2 - (6)^2
(KP)^2 = (10×10) - (6×6)
(KP)^2 = 100 - 36
(KP)^2 = 64
KP = 8 cm

karena KP = PM = 8 cm, maka panajng tali busur KM = KP + PM = 8+8 = 16 cm

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