一条弧AB和经过这条弧的端点的两条半径OA,OB所组成的图形叫( sector);顶点在圆心的角叫做圆心角 (central angle).例 将一个圆分割成三个扇形,它们的圆心角的度数比为1:2:3,这三个扇形的圆心角的度数解:因为一个周角为360^{\circ},所以分成的三个扇形的圆心角分别是:...
解析 Radius=6cm Denote the radius of a sector as rcm Derive r=6 from r2×3.146=18.84. The radius is 6cm.结果一 题目 Given that the area of a sector is 18.84cm2 and the central angle is 60∘, find the radius and circumference of the sector. (π=3.14) 答案 Radius=6cm, ...
百度试题 结果1 题目If the radius of a sector is R and its central angle is n", then the length of the arc expressed in terms of R and n is 相关知识点: 试题来源: 解析 π/(180)⋅ nR 180 反馈 收藏
In order to find the area of a sector with the central angle inradians, 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 ...
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...
结果1 题目Given that the area of a sector is 18.84(()^2) and the central angle is 60()° , find the radius and circumference of the sector. (π=3.14)相关知识点: 试题来源: 解析 Radius=6(cm), circumference =18.28(cm).反馈 收藏 ...
2 Given that the areas o f two sectors are equal and the central angle o f Sector A is o f the central angle o f Sector B,then the radius o f Sector A is the radius o f Sector B.(A)of(B)2 times(C)16 of(D)4 times2 Given that the areas o f two sectors are equal and...
2 Given that the radius of a sector is5 cm and its central angle is36°,then the area of thesector is ()(A)3.14cm2(B)3.925cm2(C)7.85cm2(D)15.7cm22 Given that the radius of a sector is 5 cm and its central angle is 36°,then the area of the sector is( ). (A)3.14 cm ...
As 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 area of the sector is . The arc length of the sector is . The perimeter of the sector is . ...
Here ‘θ’ refers to the value of the central angle in degrees. For instance, if a sector has a central angle of 45 degrees, the sector proportion can be calculated as: Sector proportion = (45/360) ×π Sector proportion = 0.125 π This indicates that the area of the sector constitute...