(b⁷/4⁵)⁻³
= (4⁵/b⁷)³
= 4¹⁵/b²¹
Therefore answer is option b
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Answer:
equilateral because all the sides are equal
We know that the sum of measures of internal angles in each quadrangle is 360°.
Look at the picture.

Therefore we have:

Answer: θ = 141 deg.