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Answer:
the answer is 12 units for sure
do u need explanation?
if B -4,0
and a -7,0
so the distance between them is 3
and c -7,4 so the distance between CA is 4
by Pythagoras Theorem to get CB
(4×4) + (3×3) = 16+9=25
SO WE MAKE A SQUARE ROOT ON 25
it will be 5 so the perimeter equal 4+5+3=12