Jari jari lingkaran luar segitiga dengan sisi-sisi 14 cm ,12 cm,dan 10 cm adalah

S=1/2(14+12+10)
=1/2(36)
=18
L=√S(S-a)(S-b)(S-c)
=√18(18-14)(18-12)(18-10)
=√18.4.6.8
=√3456
=24√6 cm ^2
r=abc/4L
=14.12.10/4.24√6
=17,5/√6
=17,5√6/6 cm
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S=1/2(a+b+c)
S=1/2(14+12+10)
S=1/2(36)
S=18

L =√S(S-a)(S-b)(S-c)
L =√18(18-14)(18-12)(18-10)
L =√18.4.6.8
L =√576 × 6
L =24√6 cm^2

r = abc/4L
r = 14.12.10/4×24√6
r = 17,5/√6
r = 17,5√6/6 cm