m9597872moedledumy
m9597872moedledumy
03-12-2021
Mathematics
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mhanifa
mhanifa
03-12-2021
Answer:
5 cm
Step-by-step explanation:
AB = DC as opposite sides of rectangle.
DE = AD as equal sides of isosceles triangle
DE + EC = DC segment addition postulate
Now substitute the values and find the length of EC:
EC = AB - AD
EC = 4p + 3 - (3p - 1)
EC = 4p + 3 - 3p + 1
EC = p + 4
Given p = 1
EC = 1 + 4 = 5 cm
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