Question and Answers Forum

All Questions      Topic List

Geometry Questions

Previous in All Question      Next in All Question      

Previous in Geometry      Next in Geometry      

Question Number 17901 by chux last updated on 12/Jul/17

Commented by chux last updated on 12/Jul/17

find the radius of the big and  small circle

findtheradiusofthebigandsmallcircle

Commented by chux last updated on 12/Jul/17

yes,they are

yes,theyare

Answered by mrW1 last updated on 12/Jul/17

2(R−r)=90   ...(i)  (R−50)^2 =r^2 −(R−r)^2    ...(ii)  (i):  R=45+r  (ii):  (45+r−50)^2 =r^2 −(45)^2   (r−5)^2 =r^2 −45^2   r^2 −10r+25=r^2 −45^2   10r=2050  r=205  R=45+205=250

2(Rr)=90...(i)(R50)2=r2(Rr)2...(ii)(i):R=45+r(ii):(45+r50)2=r2(45)2(r5)2=r2452r210r+25=r245210r=2050r=205R=45+205=250

Commented by chux last updated on 12/Jul/17

thank you sir

thankyousir

Terms of Service

Privacy Policy

Contact: info@tinkutara.com