半径
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Noun meaning 'radius,' the distance from the center of a circle to its edge. Used in geometry, science, and measurements. Example: 『この円の半径は5センチです』 (kono en no hankei wa go senchi desu, 'The radius of this circle is 5 centimeters.').
Theme
At a science club meeting, User and their friend Ken are working on a geometry problem involving circles.
半径
はんけい
radius
Advanced ExpansionAbstract Concepts
Memory Hook
Picture a circle with a line from the center to the edge — that's the 'radius.' 'Han-kei' (はんけい) sounds like 'half-circle,' which relates to radius as half the diameter!
Cultural Note
In Japan, 『半径』 (hankei) is commonly taught in math classes and used in engineering or design, such as in『都市計画』 (toshi keikaku, 'urban planning') to calculate distances from central points.
Forms
Base: 半径Noun meaning 'radius,' the distance from the center of a circle to its edge. Used in geometry, science, and measurements. Example: 『この円の半径は5センチです』 (kono en no hankei wa go senchi desu, 'The radius of this circle is 5 centimeters.').