If the area of a circle is 81π, then the diameter of the circle isA、9B、18C、36

游客2025-02-27 1

问题 If the area of a circle is 81π, then the diameter of the circle is

选项 A、9
B、18
C、36
D、9π
E、18π

答案 B

解析 The formula for the area of a circle is πr2. Therefore, the radius of this circle is the square root of 81, or 9. The diameter is twice the radius, so 18.

转载请注明原文地址:https://tihaiku.com/zcyy/3974882.html

相关试题推荐

Iftheareaofacircleis81π,thenthediameterofthecircleisA、9B、18C、36
Inthefigure,Oisthecenterofthecircleandtheareaofthecircleis4π,w
Inthecoordinateplane,pointsAandBareendpointsofadiameterofacircle
[img]ct_gre5image002[/img]Thediameterofthecircleis10.ColumnA
[img]ct_gre5image016[/img]Thecirclesabove,withcentersOandP,eachhavera
Whatistheareaofacirclewithacircumferenceof14πinches?Theequationf
Whatistheareaofacirclewhoseradiusisthediagonalofasquarewhosearea
Whichofthefollowingpointsliesintheinteriorofthecirclewhoseradiusis
Tiffanyinflatesabeachball.Ifthediameteroftheballis0.6m,whatisits
Whatistheareaofacirclewithacircumferenceof14πinches?49πTheequation

随机试题

Accordingtoasurvey,whichwasbasedontheresponsesofover188,000stud
Bythemiddleofthe21stcentury,thevastmajorityoftheworld’spopulation_
_______________________________isoftencalledscapegoating.(用怪罪别人的方法来解决问题)Eli
WhenZadieSmithfinishedhermostrecentnovel,OnBeauty,shedrankabott
一个浴盆,若单放热水,10分钟可以放满;单放冷水,8分钟可以放满.小王因为大意,
关于基金管理人的基金资产估值工作，表述正确的有（）。A:建立健全估值决策体系B
对细菌性食物中毒的诊断原则是A.发病季节都在9月份，并与食用某种食物有确切关系
(2013年）关于物联网的说法，正确的有（）。A.物联网的核心和基础是互联网
设置钢筋混凝土构造柱的砖墙砌体，施工时应（）。A.先浇构造柱后砌墙 B.从每

最新回复(0)

If the area of a circle is 81π, then the diameter of the circle isA、9B、18C、36

Iftheareaofacircleis81π,thenthediameterofthecircleisA、9B、18C、36

Inthefigure,Oisthecenterofthecircleandtheareaofthecircleis4π,w

Inthecoordinateplane,pointsAandBareendpointsofadiameterofacircle

[img]ct_gre5image002[/img]Thediameterofthecircleis10.ColumnA

[img]ct_gre5image016[/img]Thecirclesabove,withcentersOandP,eachhavera

Whatistheareaofacirclewithacircumferenceof14πinches?Theequationf

Whatistheareaofacirclewhoseradiusisthediagonalofasquarewhosearea

Whichofthefollowingpointsliesintheinteriorofthecirclewhoseradiusis

Tiffanyinflatesabeachball.Ifthediameteroftheballis0.6m,whatisits

Whatistheareaofacirclewithacircumferenceof14πinches?49πTheequation

Accordingtoasurvey,whichwasbasedontheresponsesofover188,000stud

Bythemiddleofthe21stcentury,thevastmajorityoftheworld’spopulation_

_______________________________isoftencalledscapegoating.(用怪罪别人的方法来解决问题)Eli

WhenZadieSmithfinishedhermostrecentnovel,OnBeauty,shedrankabott

一个浴盆,若单放热水,10分钟可以放满;单放冷水,8分钟可以放满.小王因为大意,

关于基金管理人的基金资产估值工作，表述正确的有（）。A:建立健全估值决策体系B

对细菌性食物中毒的诊断原则是A.发病季节都在9月份，并与食用某种食物有确切关系

(2013年）关于物联网的说法，正确的有（）。A.物联网的核心和基础是互联网

设置钢筋混凝土构造柱的砖墙砌体，施工时应（）。A.先浇构造柱后砌墙 B.从每