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gismu rafsi: jga x₁ is an angle [2-dimensional shape/form] from vertex x₂ subtended by lateral [segment] x₃. Also (adjective:) x₁ is angular; x₂ corner; (segment x₃ can be defined by interval). See also kojna, linji, konju, mokca.

This angle subtends one radian.

This is a slope towards the horizontal surface.

This is an angle from vertex A having the lateral of 0.5 meters and subtending two steradians.

lujvo c₁ is trigonometry of triangle j₁. Cf. ci, jganu, cmaci, cibjgatai.

gismu rafsi: cid x₁ is a/the knee/elbow/knuckle [hinged joint, body-part] of limb x₂ of body x₃. Metaphor: a sharp bend/curve. See also korcu, jarco, jganu.

gismu rafsi: kon ko'u x₁ is a cone [shape/form] of material x₂ with vertex x₃. Also ellipse, ellipsoid (= konclupa). See also jesni, djine, sovda, kojna, jganu.

gismu rafsi: lij li'i x₁ is a line/among lines [1-dimensional shape/form] defined by set of points x₂. Ray/vector (farli'i or porli'i). See also kruvi, sirji, jganu, kantu, mokca.

gismu rafsi: moc x₁ is a point/instant/moment [0-dimensional shape/form] in/on/at time/place x₂. x₁ is dimensionless. See also jipno, jganu, linji, stuzi, tcika.

gismu rafsi: koj ko'a x₁ is a corner/point/at-least-3-dimensional [solid] angle [shape/form] in/on x₂, of material x₃. Also apex; a corner exists on three dimensions but need not be limited to points; it suggests a discontinuity in slope in some direction; i.e. in some planar cross-section. See also jipno, konju, bliku, fanmo, jganu, krasi.

gismu rafsi: ra'o x₁ is x₂ radian(s) [metric unit] in angular measure (default is 1) by standard x₃. Measured in degrees (julra'o); right ascension astronomical measurement. (= cacryra'o). See also jganu, kilto, centi, decti, dekto, femti, gigdo, gocti, gotro, gutci, litce, megdo, mikri, milti, minli, nanvi, petso, picti, terto, xatsi, xecto, xexso, zepti, zetro.