直径 直徑
Stroke order
Show the animation Stroke data from Make Me a Hanzi, derived from the Arphic PL fonts under the Arphic Public License.
Show the animation 
Stroke data from Make Me a Hanzi, derived from the Arphic PL fonts under the Arphic Public License.
How it used to be written
直
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Oracle bone script 商 -
Clerical script 東漢 - See all 15 forms
径
These are the forms of 徑, the traditional character: 径 is a twentieth-century simplification, found in no ancient corpus.
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Small seal script -
Clerical script 西漢 - See all 3 forms
Forms, sources and dates: the 字形演變 database of 小學堂, Academia Sinica, public domain (CC0).
Examples
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用圆周能不能求得直径？
Is it possible to determine the diameter from the circumference?
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该飞行器有两个直径 7 公尺巨大太阳能电池板，为其提供从太阳出发飞行 8.5 亿公里所需的动力。
The craft has two massive solar panels, 7 meters each, that will provide the power it needs to travel 850 million kilometers from the sun.