3 years ago

The triangles are similar.

Mathematics

2 answers:

galben [10]3 years ago

8 0

21 21 beacause 7x3 is 21

myrzilka [38]3 years ago

4 0

21 is the value of x. the bigger triangle is three times the size of the smaller rectangle. so you multiply all of the sides of the smaller triangle by 3 to get the sides of the bigger triangle.

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