Pliss Pake Cara..........

13. Dik: r1=7cm, r2=4cm, s=11cm
Dit: gl?
Jawab:
gl=√s²-(r1- r2)²
gl=√11²-(7-4)²
gl=√121-3²
gl=√121-9
gl=√112 cm

14. Dik: r1=7cm, r2=3cm, s=26cm
Dit: gd?
Jawab:
gd=√s²-(r1+r2)²
gd=√26²-(7+3)²
gd=√676-10²
gd=√676-100
gd=√576
gd=24 cm