Radiyan shi ne na'urar ma'auni . Ana nuna ta ta hanyar alamar "rad" ko, ƙasa da yawa, ^c (don ma'aunin madauwari). Radian ya kasance ɗayan ƙarin SI, to amma an canza shi zuwa naúrar da aka samu a cikin shekara ta alif Dari Tara da casain da biyar 1995. ^[1]Tsawon baka na radians yayi daidai da radiyan daga da'irar da yake sashi.^[2]

Samfuri:Float box Yawancin mutanen da ke yin lissafi ko kimiyyar lissafi suna amfani da radians, maimakon digiri, saboda wasu nau'ikan lissafin, galibi a cikin trigonometry da ƙididdiga, sun fi sauƙi yayin amfani da radians maimakon digiri.^[3] Don haka, yawancin lissafin da ke da alaƙa da mitar angular (kamar saurin angular ) suna amfani da radians a sakan daya.

Mutanen da ke duba ta hanyar na'urar hangen nesa ko maharbi sukan yi amfani da milliradians don kwatanta nisa kamar yadda aka gani ta hanyarsa.

Radian 1 daidai yake da kusan 57.3°. Akwai radians 2 π (kimanin 6.28 radians) a cikin cikakken da'ira. Tsarin juya radian zuwa digiri da akasin haka shine:

👁 {\displaystyle 2\pi {\mbox{ rad}}=360^{\circ }}

👁 {\displaystyle 1{\mbox{ rad}}={\frac {360^{\circ }}{2\pi }}={\frac {180^{\circ }}{\pi }}\approx 57.29577951^{\circ }}

ko:

👁 {\displaystyle 360^{\circ }=2\pi {\mbox{ rad}}}

👁 {\displaystyle 1^{\circ }={\frac {2\pi }{360}}{\mbox{ rad}}={\frac {\pi }{180}}{\mbox{ rad}}\approx 0.01745329{\mbox{ rad}}}

kuma muna iya cewa:

👁 {\displaystyle x{\mbox{ rad}}=\left({\frac {180x}{\pi }}\right)^{\circ }}
.

• Steradian
• Tau, ma'aunin cikakken da'irar a cikin radian
• da'irar raka'a