diket
r1=8 cm
r2=4 cm
j=20 cm
Ditanya A. d ???
B. l ??
A. d=√j²-(r1+r2)²
=√20²-(8+4)²
=√400-(12)²
=√400-144
=√256
= 16 cm
B. l=√j²-(8-4)²
=√20²-(4²)
=√400-16
=√384
=√64×6
=8√6 cm
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=√20²-(8+4)²
=√400-12²
=√400-144
=√256
d=16cm
diket
r1=8 cm
r2=4 cm
j=20 cm
Ditanya A. d ???
B. l ??
A. d=√j²-(r1+r2)²
=√20²-(8+4)²
=√400-(12)²
=√400-144
=√256
= 16 cm
B. l=√j²-(8-4)²
=√20²-(4²)
=√400-16
=√384
=√64×6
=8√6 cm