| circle/"s3;kl/ circumference /"s3;kVmf@r@ns/ |
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The black line is a circle (in Spanish, "circunferencia"). The figure is also a circle (in Spanish, "círculo"), or strictly speaking, a disk. The length of the circle is the circumference. |
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diameter /daI"&mIt@r/ tangent /"t&ndZ@nt/ secant /"si;k@nt/ radius /"reIdI@s/ chord /"kO;d/ |
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These are some circle lines: The magenta line is the diameter, the red line is a tangent line, the green line is a secant line, the light blue line is a radius, and the dark blue line is a chord. |
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arc /A;k/ circular sector /"s3;kjUl@r "sEkt@r/ |
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The red line is an arc, the green area is a circular sector, and the blue area between the arc and the chord is a segment. |
| rectangle /"rEk%t&Ngl/ |  |
This is a rectangle; b is the base, h is the height. |
| square /"sqwE@r/ |  |
This is a square. |
| triangle /"traI&Ngl/ |  |
This is a right triangle (a triangle which has a right angle). |
| rhombus /"rQmb@s/ |  |
This is a rhombus. |
| rhomboid /"rQmbOId/ |  |
This is a rhomboid. |
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trapezium /tr@pi;zI@m"/ trapezoid /"tr&pIzOId/ |
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This is a trapezium (in American English a trapezoid). Only two of its sides are parallel. |
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irregular quadrilateral /I"rEgjUl@ %kwQdrI"l&t@r@l/ |
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This is an irregular quadrilateral (in American English a trapezium, in Spanish "trapezoide"). |
| regular polygon /"rEgjUl@ "pQlIg@n/ |  |
This is a regular polygon (in this case, a hexagon). |
| annulus /"&njUl@s/ |  |
This is an annulus (the area between two concentric circles). |
| sphere /"sfI@r/ |  |
This is a sphere. |
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polyhedron /%pQlI"hi;dr@n/ dodecahedron /%d@UdEk@"hi;dr@n/ face(s) /"feIs(Iz)/ edge(s) /"EdZ(Iz)/ vertex /"v3;tEks/ vertices or vertexes /"v3;tI%si;z/ |
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This is a polyhedron (in this case, a dodecahedron): it is a solid in three dimensions with flat faces, straight edges and sharp corners or vertices (also vertexes; singular vertex). (Image source: wikipedia) |
| tetrahedron /%tEtr@"hi;dr@n/ |  |
This is a tetrahedron (it has four faces which are equilateral triangles). |
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hexahedron /%hEks@"hi;dr@n/ cube /"kju;b/ |
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This is a hexahedron, or a cube (it has four faces which are squares). |
| cuboid /"kju;bOId/ |  |
This is a cuboid (in Spanish, ortoedro) (it has three pairs of equal, parallel faces). |
| prism /"prIz@m/ |  |
This is a prism (it has two equal, parallel faces). |
| cone /"k@Un/ |  |
This is a cone (its base is a circle). |
| cylinder /"sIlInd@r/ |  |
This is a cylinder (its two bases are circles). |
JJCC