Answer with Step-by-step explanation:
We are given that:
tanA = 0.45
tanA=
=
⇒ =0.45
⇒ =
⇒ =
⇒ AC= 20
Hence, by pythagoras theorem
AB²=AC²+BC²
AB²=20²+9²
AB²=481
⇒ AB=21.9 units
Hence, the approximate length of AB is:
22 units
Tiles are bought in packs of 12. i need 40 how many packs do i need to buy?
1 answer:
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Answer:
Step-by-step explanation:
The figure is shown in the image attached.
Notice that the shaded light gray area can be calculated by the difference of the bigger square and the smaller square.
The area of the bigger square is:
The area of the smaller square is:
The difference between these areas is:
Therefore, the expression that can be used to find the light gray area is:
Additionally, the expression is also a right answer, because it's equivalent to the first answer.
