一条弧AB和经过这条弧的端点的两条半径OA,OB所组成的(sector);顶点在圆心的角叫做圆心角(central angle).将一个圆分割成三个扇形,它们的圆心角的$$ 1 : 2 : 3 $$这三个扇形的圆心角的度数.解:因为一个周角为$$ 3 6 0 ^ { \circ } $$,所以分成的三个扇形的圆圆心角分别是:$$ 3 6 0 ^ {...
3As shown in the figure below, the sector has a central angle of 45∘ and the radius of 8. Fill in the blanks. (Round your answers to the nearest hundredth and use 3.14 for π.)The are a of the sector is .The arc length of the sector is .The perimeter of the sector is .反...
In order to find the area of a sector with the central angle in radians, we use the formula, Area of sector = (θ/2) × r2; where θ is the angle subtended at the center, given in radians, and 'r' is the radius of the circle. For example, if the radius of the circle is 12...
2.(Mathematics)geometryeither portion of a circle included between two radii and an arc. Area:r2θ, whereris the radius and θ is the central angle subtended by the arc (in radians) 3.(Mathematics) a measuring instrument consisting of two graduated arms hinged at one end ...
particular, a sector of a circle is bounded by two radii and an arc cut off by the radii. The area of a sector of a circle is equal tolr/2or πr2α/360, where l is the length of the arc, α is the central angle (in degrees) subtended by the arc, andris the radius of the...
1The central angle is 45∘, and the radius is 8. Round your answers to the nearest hundredth and use 3.14 for π.The area of the sector is .The arc length of the sector is .The perimeter of the sector is .→45% 2The central angle is 45∘, and the radius is 8. Round your...
Calculate the arc length of a sector if the angle of the sector is60 degreesand the radius of the circle is 6 meters. Solution Since we know that: Arc length of a sector =L= (θ/360) × 2πr According to the given data:
Sector B,then the radius of Sector A is the radius of Sector B.(A)of(B)2 times(C)1 B of(D)4 times2 Given that the areas of two sectors are equal and the central angle of Sector A i of the central angle of Sector B,then the radius of Sector A is()the radius of Sector B...
Astronomy.an instrument shaped like a sector of a circle, having a variable central angle and sights along the two straight sides, for measuring the angular distance between two celestial bodies. Computers.a portion of a larger block of storage, as 1/128 of a track or disk. ...
A sector is like a “pizza slice” of the circle. It consists of a region bounded by two radii and an arc lying between the radii. The area of a sector is a fraction of the area of the circle. This area is proportional to the central angle. In other words, the bigger the central...