Meehauic,. Note Book.
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Tie following convenient rules for Nickname, and others. although not perfect in their fractional pats are, nevertheless correct enough tor all prac teal purposes. They were compiled by writer in one Of our exchanges

 To fad tAs area cf Triangle. .--Multipiy the base by the perpendicular height, and take half the product fog the area.

 To fad tas area ef q Ciscis.--Muitipiy half the eIcamerehce ey half the diameter. and the product will be .he area

 10 tiad tAs csreamfsysaes ef Circle from EAs di. aaeisr .-Maitiply the diameter by 2z and divide oy 7 or to be more exact. multiply the diameter by 355. and divide by i3s.

 To fAd tAs area e aa Ogai M Multipiy the longest diameter oy the shortest; then multiply the product by the decimal 1851.

 To AaA tAe eeatsass efa Ppamid sr Coas.--Find The area ai the base. and maitpy that area by the perPsadlensas height and take one third sg .As pro duct for the coaieat>

 Ts fad iAs se.idsiy sfs SpAsys er GloSe e.--Malti. ply the surface by th1 diameter snd take one s xth oi the product fcf .se eon:eEts.