直径
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Noun describing the straight line passing through the center of a circle, connecting two points on the circumference. Used in geometry and technical contexts. Example: 『円の直径を測る』 (en no chokkei o hakaru, 'measure the diameter of a circle').
Theme
Two classmates, Aya and User, are studying for a math test and discussing circles in their textbook. Aya is pointing at a diagram.
直径
ちょっけい
diameter
Advanced ExpansionAbstract Concepts
Memory Hook
Think of a 'diameter' as a straight line through the center of a circle. 'Diameter' → 直径 (chokkei, 'diameter'). 'Chokkei' sounds like 'choke key' – imagine a key that fits through the center to measure the diameter.
Cultural Note
『直径』 (chokkei, 'diameter') is commonly used in mathematics, engineering, and manufacturing in Japan. It's essential in traditional crafts like pottery, where precise measurements ensure symmetry in『茶碗』 (chawan, 'tea bowls').
Forms
Base: 直径Noun describing the straight line passing through the center of a circle, connecting two points on the circumference. Used in geometry and technical contexts. Example: 『円の直径を測る』 (en no chokkei o hakaru, 'measure the diameter of a circle').