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MrRissso [65]
3 years ago
8

The diagram shows the universal set U = {parallelograms}. Set A represents parallelograms with four congruent angles .

Mathematics
2 answers:
tino4ka555 [31]3 years ago
3 0
26 is the number of the parallelograms that fall into the category A U B. In this universal set, you must likely to find 26 parallelograms that fall into the category A U B. With 4 congruent sides and four congruent angles in set A and B we can see 26 parallelograms that fall into the category A U B.
8090 [49]3 years ago
3 0

Answer:  The number of parallelograms that fall into the category A ∪ B is 26.

Step-by-step explanation:  The given diagram shows the universal set U defined by

U = {parallelograms}.

Set A represents parallelograms with congruent sides and set B represents parallelograms with four congruent angles.

We are to find the number of parallelograms that fall into the category A ∪ B.

From the diagram, we find that

n(A)=12+8=20,\\\\n(B)=6+8=14,\\\\n(A\cap B)=8,\\\\n(A\cup B)=?

From set theory, we have

n(A\cup B)=n(A)+n(B)-n(A\cap B)=20+14-8=26.

Thus, the number of parallelograms that fall into the category A ∪ B is 26.

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