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= akar dr 36-9
= √27
= √9.3
= 3√3 = 3.1,73 = 5,19 cm
L.tembereng = L 1/4 lingkaran - L sgitiga
= 1/4.phi.r² - 1/2.a t
= 1/4.3,14.6² - 1/2.6.5,19
= 200,96 -15,57
= 185,39 cm²
sdt APB = 60⁰ (krn segitiga APB adalah segitiga sama sisi)
L juring APB = 60 / 360 . π . 6.6
= 6π
= 6.3,14
= 18,84 cm²
tinggi segitiga APB = t
t² = 6²-3²
t² = 36-9
t² = 27
t = √27
t = 3√3
L segitiga APB = a.t / 2
= 6 . 3√3 / 2
= 9√3
= 9.1,73
= 15,57
Luas yg diarsir = 18,84 - 15,57 = 3,27 cm²