How Mt.Everest height is calculated in 1800s?

World lo highest mountain edhi anni adigithe ventane andaru chepe answer Mount Everest height is 29030 feet… kani daniki aa name enduku vachindi anni entha mandiki telusu…

1800s lo Mountain ni different names tho pilichevallu like peak B or peak xv aithe 1856lo George Everest ane geologist ki honour ga mountain ki aa name pettaru…kani aa mount everest ki george ki elanti link ledhu ante namutara… aithe george chesina pani emitante okka iddaru geologist and maths scientists ni hire chesukunnadu… valle                    “Andrew Scott Waugh & Radhanath Sikdar”

Vellu iddaru kalisi mount everest height ni kanipettaru…danilo wonder emi undhi anni anukuntunnara… kanipettindhi 1852 lo adhi kuda only Triangle, Trigonometry and a special tool protector called Theodolite use chesi… ikkada enko twist enti ante mount Everest ni 100miles (168kms) nunchi chustha aa mountain height kanipetaru…

Mountain ni okka single line ga tesukunnaru…ante mountain bottom (ground tho touch ayye place) point B anukunte, mountain top tip vachi point C… triangle base kosam point B nunchi kontha distance lo point A ni tesukunnaru(point B anedi point A ki same height lo undelaga chusukunnaru)

EE three points ni kalipi BAC ane right angle triangle ni form chesaru…(mountain anedi Ground ki straight ga untundhi kabatti angle b/w ground and mountain is 90°)

Ippudu mana dagara telisina values…
Length of base point A to point B…
Angel b/w mountain height and ground(i.e. angel b/w CBA is) 90°
Angel between ground and slope(i.e. angel b/w BAC) ni kanipettadaniki special protector Theodolite ni use chesaru…( Theodolite ni 16th-century lo mathematician Leonard Digges invest chesaru…denni use chesi okka horizontal and okka vertical line madhya unna angel ni kanipettavachu…)

Ippudu Triangle lo two angles telisipoyae so thrid angel automatic ga telisipothundhi….sum of all angels in a triangle is equal to 180°…

Lets suppose
angle BAC is 60°
angle CBA is 90°
so angel ABC is 180°-90-60=30°

sin 60 = mountain height(x) / slope(y)
sin 30= base(z) / slope(y)
sin 60 / sin 30 = x/z

sin30 ,sin60 and z value already telusu…ee calculation nundi x value(mountain height) ni kanipetaru…

Same process ni point A place ni marsthu different different triangles nunchi vachina average nundi Mount Everest height 29000 feet anni calculate chesaru…

Sea level nunchi height calculate cheyali anni enko 2 feet kalipi 29002 feet ga Mount Everest height ni kanipetti world lo ne highest peak ga recognise chesaru…

147 years fast forward chesthe ante 1999 lo scientists lu satellites help tho Mount Everest nj calculate chesi sea level nundi 29030 feet height lo Mount Everest height anni scientific ga calculate chesaru…

Around 150 years back calculate chesina height ki ipoatiki difference is only 28 feet…

Manaki teliyanidhi emitante mountain height ni kanipettadaniki satellite lo use chese formulae kuda idhe…