Solve one-third/5 = a/20 a = 3/5 a = 3/4 a = 4/3 a = 5/3
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12÷4=3 and 36÷12=3
so the ratio is same
therefore it is a geometry sequence
=108
so the ratio is same
therefore it is a geometry sequence
=108
A(-3, -1); B(2, -1), C(2, 3)
You can read the length of AB and BC.
|AB| = 5
|BC| = 4
Use the Pythagorean theorem:
The perimeter: