The area of a sector of a circle 'a' can be calculated using the formula a=πr²s/360, where 'r' is the radius and 's' is the angle measure in degrees. The rotation angle is the arc length in relation to the radius of the circle. This concept is part of mathematics introduced in high school.
The subject of your question is regarding the area of a sector in a circle. This is a mathematical concept usually introduced in high school level geometry. Here, the formula you've mentioned, a=πr²s/360, will enable you to calculate the area 'a' of a sector in a circle. 'r' represents the radius of the circle and 's' is the angle measure in degrees.
When we refer to rotation angle, we are talking about the arc length in relation to the radius of the circle. A full revolution of a circle is 360 degrees (°) which is equal to 2π radians. This is due to the definition of one radian as the angle when the arc length is equal to the radius of the circle.
To understand this, let's consider an example. If 's' is 90 degrees, and the radius 'r' is 1, then the area 'a' of the sector would be: a = π*1²*90/360 = π/4 square units.
#SPJ3
b.1 to 2 years
c. 4 to 5 years
d. 7 to 10 years
Answer:
The "prime time" for auditory and visual development is around:
c. 4 to 5 years
Step-by-step explanation:
Auditory and visual development in children refers to the development of capacities that allow them to perceive their surrondings and answer to them. The prime time to develop the capacity to hear and see is around 4 to 5 years.
Answer:
(x − 4)² + (y − 3)² = 25
Step-by-step explanation:
The equation of a circle is:
(x − h)² + (y − k)² = r²
Given three points on the circle, we can write three equations:
(1 − h)² + (7 − k)² = r²
(8 − h)² + (6 − k)² = r²
(7 − h)² + (-1 − k)² = r²
Expanding:
1 − 2h + h² + 49 − 14k + k² = r²
64 − 16h + h² + 36 − 12k + k² = r²
49 − 14h + h² + 1 + 2k + k² = r²
Simplifying:
50 − 2h + h² − 14k + k² = r²
100 − 16h + h² − 12k + k² = r²
50 − 14h + h² + 2k + k² = r²
Subtracting the first equation from the second and third equations:
50 − 14h + 2k = 0
-12h + 16k = 0
Solving the system of equations, first reduce:
25 − 7h + k = 0
-3h + 4k = 0
Solve with substitution or elimination. Using substitution, solve for k in the first equation and substitute into the second.
k = 7h − 25
-3h + 4(7h − 25) = 0
-3h + 28h − 100 = 0
25h = 100
h = 4
k = 7h −25
k = 7(4) − 25
k = 3
Now plug these into any of the original three equations to find r.
(1 − h)² + (7 − k)² = r²
(1 − 4)² + (7 − 3)² = r²
9 + 16 = r²
25 = r²
The equation of the circle is:
(x − 4)² + (y − 3)² = 25
Graph: desmos.com/calculator/ctoljeqhnp
10. 25 is what percent of 125?
What do you add to 4 2/9 to make 6?
Answer:
For each question, just subtract the bigger number from the smaller one :D
hmm
the question doesn't look clear