Circle Calculator Area Circunference Inputs: Radius: or Diameter or Circumference: Unit: Calculate Area Result: The area of a circle with diameter 80 is 5027 Formulae: r = 40 d = 80 C = 251 A = πr2 = π(d2)2 A = C24π π = 3.1415 A = area C = circumference ...
The area of a circle is the total area within the circumference of a circle. Both formulas use the radius of the circle, a line drawn from the center of the circle to the outer edge.Answer and Explanation: The area of a circle with a circumference of 6.28 cm is 3.14 cm2. The...
The total perimeter of the un-shaded part is made up of three sides of the rectangle and the perimeter of the half-circle. The area of a half circle = ½ π r2 8 π = ½ π r2; therefore r = 4 The perimeter of the half circle is ½ 8 π = 4 π The diameter of the ...
Show your work. 相关知识点: 试题来源: 解析 24 cmWORK SHOWN: A = πr=, 144π = πr=, r= = 144, r = 12, d = (2)(12) = 2424 cmWORK SHOWN: A = πr=, 144π = πr=, r= = 144, r = 12, d = (2)(12) = 24 反馈 收藏 ...
<p>To find the area of a circle when the diameter is given, we first need to calculate the radius. The radius is half of the diameter.</p><p>1. <strong>Identify the Diameter</strong>: The diameter of the circle is given as 2.8 cm.</p><p>2. <strong>Calcul
Example 3: A circle with a diameter of 2 units is divided into 10 equal sectors. Can you find the area of each sector of the circle? Solution: The diameter of the circle is 2 units, therefore, the radius of the circle is 1 unit. Since a complete angle of a circle = 360°, the...
The area of a sector is the product of the area of the circle and the fraction of the area of the circle (central angle to 360°). Sign in to download full-size image Asector=πr2(θ360°) Example 9 Find the area of a sector of 60° in a circle with a radius of 8 in. Sig...
Show your work. 相关知识点: 试题来源: 解析 1 ft OR ftWORK SHOWN: A = πr=, π = πr=, r= = = • , r = , d = (2) • = 11 ft OR ftWORK SHOWN: A = πr=, π = πr=, r= = = • , r = , d = (2) • = 1 反馈 收藏 ...
Find the area of the circle. (Use $=227$) Solution:The longest chord of a circle is its diameter. This means, according to the question, diameter (d) $= 14$ ft.We know that radius is half the diameter.r $= \frac{d}{2} = 142 ft = 7$ ftUsing the formula for the circle’s...
Total surface area of a hollow cylinder = 2πh(R + r) + 2π(R2 - r2)π = 3.14 h is the height r is the radius of the inner circle R is the radius of the outer circle Hemisphere: Surface area of a hemisphere = 3πr2π = 3.14 r is the radius of the hemisphereExamples...