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segitigaABC:segitigaEBD
sisi yang bersesuaian perbandingannya sbb,: AB. AC
---- = ----
EB. ED
AE+EB 12
-------- = ------
EB. 8
2. + EB. 3
--------- = ---
EB. 2
2 ,( 2 +EB ). = 3 EB
4. + 2EB= 3EB
EB. = 4