The first two are alike because you have to add 3 to each side for everything to come out even.
P usually means perimeter<span> or </span>circumference<span> of the </span><span>base.
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Are you talking about Brainly? If you are, You cannot just cancel it, you can delete it though
Steps by explanation:
for second one
centroid ={(1+3+5)/3,(2+4+0)/3}=(9/3,6/3)
=(3,2)
