a. 10/√6 b. 13/√3 c. 16/√15 d. 19/√5 Pakai Cara y

tinggi segitiga = t
t^2 = 8^2 - 2^2 = 64-4 = 60
t^2 = 60
t = akar60
t = 2 akar15 cm

r = (4×8×8)/ 4×(1/2 × 4 × 2 akar15)
=> (4×8×8)/ 2× 8akar15)
=> (2×1×8)/ akar15
=> 16/ akar15

jwb. C