In particular, the length of an arc of a circle of radius 'r' that subtends an angle θ at the center is calculated by the formula rθ × (π/180) if the angle is in degrees and if the angle is in radians, then the arc length is rθ. Let 's see how to derive these formula...
The timer shows hours (11) in a window (12) and minutes on a scale (4) included in a semicircular dial (5). The minutes are indicated by a disc (7) which carries two lozenge shaped indicators (8,9) and rotates continuously in one sense. The indicators are driven such that when ...
describe a circle/an arc etc meaning, definition, what is describe a circle/an arc etc: to make a movement which forms the shape...: Learn more.
Ant·arc·ti·ca (ănt-ärk′tĭ-kə, -är′tĭ-) A continent lying chiefly within the Antarctic Circle and asymmetrically centered on the South Pole. Some 95 percent of Antarctica is covered by an icecap averaging 1.6 km (1 mi) in thickness. The region was first explored in ...
21 The figure shows a sector OAB with centre O, and an arc BD of another circle with centre C. It is given that O C = 15 cm, OD = 12 cm and CD =9 cm.A129015 C B(a) Prove that AOD C is a right-angled triangle.[1](b)Find(i) ∠AOB, in radian,(ii) the perimeter of...
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A circle has a radius of 10 cm. If an arc of this circle has a degree measure of 330 degrees, find the length of the arc. What is the length of an arc cut off by an angle of 2.5 radians on a circle of radius 9 inches?
Given an arc of a circle, complete the circle. View Solution Given an arc of a circle, complete the circle. View Solution The radius of a circle is 14cms. The angle subtended by an arc of the circle at the centre is45∘. Find the length of the arc. ...
百度试题 结果1 题目(iv) An arc is asemi-circle when its ends are the ends of a diameter. 相关知识点: 试题来源: 解析 semi-circle 反馈 收藏
II. Fill in the blanks4 In a circle, if the length of an arc is of the circumference of the circle, then the central angle of the arc is"5 The radius of an arc in a circle is 6 cm and its central angle is 60°. The arc length is cm.6 As shown in the diagram, given t...