Eaghtyr

Clowan:Ymmydcosoylagh Ta'n fockle eaghtyr ny chur sheese er mooad ta fockley mooadys daa-howshanagh er rheynn vaghtal jeh baare, eaghtyr ny crackan, ta caglit liorish cruill ghooint. Ta'n enmys ny chur sheese er slane eaghtyr baare, eaghtyr ny crackan anchoodit jeh stooalt tree-howshanagh, lheid as sym eaghtyryn jeh çheughyn anchoodit polyheedrane.

Unnidyn

Ta unnidyn ry hoi towshanagh eaghtyr goaill stiagh lheid as:

are (a) = 100 meteryn kerrinagh (m²)

hectare (ha) = 100 areyn (a) = 10000 meteryn kerrinagh (m²)

kilometer kerrinagh (km²) = 100 hectareyn (ha) = 10000 areyn (a) = 1000000 meteryn kerrinagh (m²)

mooar-veter kerrinagh (Mm²) = 10¹² meteryn kerrinagh

trie cherrinagh = 144 oarlee cherrinagh = 0.09290304 meteryn kerrinagh (m²)

stundayrt kerrinagh = 9 trieyn kerrinagh (0.84 m²) = 0.83612736 meteryn kerrinagh (m²)

perçh kerrinagh = 30.25 stundayrtyn kerrinagh = 25.2928526 meteryn kerrinagh (m²)

meeilley cherrinagh = 640 acyryn (2.6 km²) = 2.5899881103 kilometeryn kerrinagh (km²)

Formley

Formley cadjin da eaghtyr:

Cummey	Cormid	Ceaghlee
Kerrin	$s^2$	She $s$ lhiurid un çheu y cherrin.
Troorane cadjin (troorane co-lhiatteeagh)	$\frac{\sqrt{3}}{4}{s}^2$	She $s$ lhiurid un çheu y troorane.
Shey-lhiattaghan cadjin	$\frac{3\sqrt{3}}{2}{s}^2$	She $s$ lhiurid un çheu y shey-lhiattaghan.
Hoght-lhiatteeane cadjin	$2(1+\sqrt{2})s^2$	She $s$ lhurid un çheu y hoght-lhiatteeane.
Yl-lhiatteeane cadjin erbee	$\frac{1}{2}ap$	She $a$ yn apothem, ny craue raadeeoil jeh kiarkyl grainnit 'syn yl-lhiatteeane, as she $p$ ym-linney yn yl-lhiatteeane.
Yl-lhiatteeane cadjin erbee	$\frac{n{s}^2}{4\cdot \tan (\pi /n)}$	She $s$ y çheu-lhiurid as she $n$ earroo ny çheughyn.
Yl-lhiatteeane erbee (jannoo ymmyd jeh towse keim)	$\frac{n{s}^2}{4\cdot \tan (180^{\circ }/n)}$	She $s$ y çheu-lhiurid as she $n$ earroo ny çheughyn.
Kiare-chuilleig	$lw$	She $l$ as $w$ lhiuridyn jeh çheughyn ny kiare-chuilleig (lhiurid as lheead).
Coheeyntane (dy cadjin)	$bh$	She $b$ as $h$ lhiurid y vun as lhiurid yn yrjid jeeraghan, er lheh.
Rhombus	$\frac{1}{2}ab$	She $a$ as $b$ lhiuridyn daa hessen y rhombus.
Troorane	$\frac{1}{2}bh$	She $b$ as $h$ bun as yrjid (towsit ayns jeeraghan rish y vun), er lheh.
Troorane	$\frac{1}{2}ab\sin (C)$	She $a$ as $b$ daa çheu erbee, as she $C$ yn uillin eddyr oc.
Kiarkyl	$\pi r^2\text{ny}\frac{\pi d^2}{4}$	She $r$ y chraue raadeeoil as she $d$ y crantessen.
Eelips	$\pi ab$	She $a$ as $b$ ny h-essylyssyn lieh-vooar as lieh-veg, er mod.
Far-voayrdeen	$\frac{1}{2}(a+b)h$	She $a$ as $b$ ny çheughyn coheeynt as she $h$ y foddeeaght (yrjid) eddyr ny colinnaghyn.
Slane eaghtyr y Rollian	$2\pi r^2+2\pi rh$	She $r$ as $h$ y chraue raadeeoil as yn yrjid, er mod.
Eaghtyr lhiattagh y rollian	$2\pi rh$	She $r$ as $h$ y chraue raadeeoil as yn yrjid, er mod.
Slane eaghtyr y chughlin	$\pi r(l+r)$	She $r$ as $l$ y chraue raadeeoil as yn yrjid sceau, er mod.
Eaghtyr lhiattagh y chughlin.	$\pi rl$	She $r$ as $l$ y chraue raadeeoil as yn yrjid sceau, er mod.
Slane eaghtyr ny cruinney	$4\pi r^2\text{ny}\pi d^2$	She $r$ and $d$ are the radius and diameter, respectively.
Slane eaghtyr yn eelipsoyd		Jeeagh er yn art.
Rheynnag chiarkylagh	$\frac{1}{2}{r}^2\theta$	She $r$ as $\theta$ y chraue raadeeoil as yn uillin (ayns raadjanyn), er mod.
Çhyndaays eaghtyr kerrinagh dys eaghtyr kiarkylagh	$\frac{4}{\pi }A$	She $A$ eaghtyr y cherrin ayns unnidyn kerrinagh.
Çhyndaays eaghtyr kiarkylagh dys eaghtyr kerrinagh	$\frac{1}{4}C\pi$	She $C$ eaghtyr y chiarkyl ayns unnidyn kiarkylagh.

Ta ny calghoolyssyn shoh heose taishbyney c'red eaghtyr ram cummaghyn cadjin y gheddyn.