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Sagot :

Amandacrystal08idn

Answer:

use common sense!!!!!!!!!!!!!!!!!!!!!

Answer:

45 cm

Step-by-step explanation:

since perimeter of ABC is 42, you subtract 12 from 42 to give you 30, and since ABC is isosceles you divide 30 by 2 to give you 15 for AB and BC and because BDC is equilateral, 15, 15, 15 each side gives you 45 cm

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