The operations property states that

The Commutative Property of Addition states that changing the order of addends does not change the sum. The commutative property of multiplication states that two numbers can be multiplied in either order. The associative property states that you can add any numbers regardless of how the numbers are grouped.

Step-by-step explanation: This may be what you are talking about

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step-by-step explanation:

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet