panjang jari jari linvkaran dalam segitiga sembarang sisi 26 siku siku 10

t = √26² - 10²
t = √676 - 100
t = √576
t = 24

S = 1/2 K
S = 1/2 (26 + 24 + 10)
S = 1/2 (60)
S = 30

L = a x t / 2
L = 10 x 24 / 2
L = 10 x 12
L = 120

a.
r = L / S
r = 120 / 30
r = 4