Tolong ya teman2 Pake caranya Besokdkumpul

1.
Penyelesaian:
Diket.:
R = MA = 5 cm
r = NB = 4 cm
k = MN = 15 cm
Ditanya:
d = AB = ....?
Jawab:
d = √ k² - (R + r)²
d = √ 15² - (5 + 4)²
d = √ 15² - 9²
d = √ 225 - 81
d = √ 144
d = 12 cm

2.
Penyelesaian:
Diket.:
d = 20 cm
R = 9 cm
r = 6 cm
Ditanya:
k = ....?
Jawab:
d = √ k² - (R + r)²
20 = √ k² - (9 + 6)²
20² = k² - 15²
400 = k² - 225
- k² = - 400 - 225
k² = 400 + 225
k² = 625
k = √ 625
k = 25 cm

4.
Penyelesaian:
Diket.:
R = PA = 8 cm
r = QB = 3 cm
k = PQ = 13 cm
Ditanya:
l = AB = ....?
Jawab:
l = √ k² - (R - r)²
l = √ 13² - (8 - 3)²
l = √ 13² - 5²
l = √ 169 - 25
l = √ 144
l = 12 cm

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