Tolong ya teman2 Pake caranya Besokdkumpul Hanya 1, 2, 4 Terimakasih Tolong yaa..Pliss

Jawab :

1) R + r = 5 + 4 = 9 cm

x = GSPD
   = √15² - 9²
   = √225 - 81
   = √144
   = 12 cm

2) R + r = 9 + 6 = 15 cm

x = Jarak titik pusat
   = √20² + 15²
   = √400 + 225
   = √625
   = 25 cm

3) R + r = 6 + r

r = √26² - 24² - 6
  = √676 - 576 - 6
  = √100 - 6
  = 10 - 6
  = 4 cm

4) R - r = 8 - 3 = 5 cm

x = GSPL
   = √13² - 5²
   = √169 - 25
   = √144
   = 12 cm