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ada 4 garis singgung yaitu 2 singgung dalam dan 2 singgung luar
jawaban soal B
garis singgung dalam (d)
d² = p²-(r1+r2)²
d² = 10² - ( 5+3)²
d² = 100 - 8²
d² = 100 - 64
d² = 36
d = √36
d = 6 cm
garis singgung luar (l)
l²=p²-(r1-r2)²
l² = 10² - ( 5-3)²
l² =100 - 2²
l² =100-4
l² = 98
l = √ 98
l = 7√2