What real world situation would be rotation in geometry
1 answer:
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Answer:
360
Area
Step-by-step explanation:
The formula of the area of a sector in a circle is:
Area of sector = × πr², where
- x is the central angle of the sector
- πr² is the area of the sector
Example:
The measure of a central angle is 60°, and the area of the circle is 12π unit², then the area of the sector of the central angle is:
Area of the sector = × 12π = 2π
To find the area of the sector
Divide the measure of the central angle by 360
Multiply the result by Area of the circle
The set A satisfying the given inequality is A = (-, -10].
Following are some facts which are true for an inequality relation:
- Equal numbers can be added or subtracted from both sides of an inequality without affecting the inequality sign.
- The Inequality sign is unchanged if both sides are multiplied or divided by a positive number, but when multiplied or divided by a negative number the inequality sign is reversed.
Since y ∈ B, -2 ≤ y ≤ 7. So,
The set {-x | inequality (1) holds ∀ y ∈ B} is [10, ) i.e.
10 ≤ -x ≤ .
Multiplying -1 throughout gives
-10 ≥ x ≥ -.
x, thus, lies in the range A = (-, -10}.
Learn more about the inequality here.
Disclaimer: The question was incomplete. Please find the full content below.
<h3>Question </h3>Find the set A such that for x ∈ A
∀y ∈ B = {y ∈ R | -2 ≤ y ≤ 7}.
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