{"id":84,"date":"2010-10-05T13:34:16","date_gmt":"2010-10-05T21:34:16","guid":{"rendered":"http:\/\/www.technicaljapanese.com\/?p=84"},"modified":"2012-01-26T13:29:56","modified_gmt":"2012-01-26T21:29:56","slug":"basic-2d-geometry","status":"publish","type":"post","link":"http:\/\/www.technicaljapanese.com\/?p=84","title":{"rendered":"Basic 2D Geometry"},"content":{"rendered":"

Although they may already be familiar, it is important to be sure you know the basic geometric shapes:<\/p>\n

\u00e5\u2020\u2020\u00e5\u00bd\u00a2 – \u00e3\u0081\u02c6\u00e3\u201a\u201c\u00e3\u0081\u2018\u00e3\u0081\u201e – a circle
\n\u00e4\u00b8\u2030\u00e8\u00a7\u2019\u00e5\u00bd\u00a2 – \u00e3\u0081\u2022\u00e3\u201a\u201c\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u2018\u00e3\u0081\u201e – a triangle
\n\u00e6\u00ad\u00a3\u00e6\u2013\u00b9\u00e5\u00bd\u00a2 – \u00e3\u0081\u203a\u00e3\u0081\u201e\u00e3\u0081\u00bb\u00e3\u0081\u2020\u00e3\u0081\u2018\u00e3\u0081\u201e – a square
\n\u00e5\u203a\u203a\u00e8\u00a7\u2019\u00e5\u00bd\u00a2 – \u00e3\u0081\u2014\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u2018\u00e3\u0081\u201e – a quadrilateral
\n\u00e9\u2022\u00b7\u00e6\u2013\u00b9\u00e5\u00bd\u00a2 – \u00e3\u0081\u00a1\u00e3\u201a\u2021\u00e3\u0081\u2020\u00e3\u0081\u00bb\u00e3\u0081\u2020\u00e3\u0081\u2018\u00e3\u0081\u201e – a rectangle
\n\u00e4\u00ba\u201d\u00e8\u00a7\u2019\u00e5\u00bd\u00a2 – \u00e3\u0081\u201d\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u2018\u00e3\u0081\u201e – a pentagon
\n\u00e5\u2026\u00ad\u00e8\u00a7\u2019\u00e5\u00bd\u00a2 – \u00e3\u201a\u008d\u00e3\u0081\u00a3\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u2018\u00e3\u0081\u201e – a hexagon
\n\u00e4\u00b8\u0192\u00e8\u00a7\u2019\u00e5\u00bd\u00a2 – \u00e3\u0081\u2014\u00e3\u0081\u00a1\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u2018\u00e3\u0081\u201e – a septagon\/heptagon
\n\u00e5\u2026\u00ab\u00e8\u00a7\u2019\u00e5\u00bd\u00a2 – \u00e3\u0081\u00af\u00e3\u0081\u00a3\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u2018\u00e3\u0081\u201e – an octagon<\/p>\n

In these words, \u00e3\u20ac\u0152\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u2018\u00e3\u0081\u201e\u00e3\u20ac\u008d can alternatively be pronounced \u00e3\u20ac\u0152\u00e3\u0081\u2039\u00e3\u0081\u00a3\u00e3\u0081\u2018\u00e3\u0081\u201e\u00e3\u20ac\u008d, which is a little easier to pronounce.<\/p>\n

Equilateral shapes are prefixed with \u00e3\u20ac\u0152\u00e6\u00ad\u00a3 – \u00e3\u0081\u203a\u00e3\u0081\u201e\u00e3\u20ac\u008d.<\/p>\n

\u00e6\u00ad\u00a3\u00e4\u00b8\u2030\u00e8\u00a7\u2019\u00e5\u00bd\u00a2 – \u00e3\u0081\u203a\u00e3\u0081\u201e\u00e3\u0081\u2022\u00e3\u201a\u201c\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u2018\u00e3\u0081\u201e – equilateral triangle
\n\u00e6\u00ad\u00a3\u00e5\u2026\u00ad\u00e8\u00a7\u2019\u00e5\u00bd\u00a2 – \u00e3\u0081\u203a\u00e3\u0081\u201e\u00e3\u201a\u008d\u00e3\u0081\u00a3\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u2018\u00e3\u0081\u201e – equilateral hexagon<\/p>\n

There are several specific triangles and quadrilateral with specific terminology:
\n\u00e4\u00ba\u0152\u00e7\u00ad\u2030\u00e8\u00be\u00ba\u00e4\u00b8\u2030\u00e8\u00a7\u2019\u00e5\u00bd\u00a2 – \u00e3\u0081\u00ab\u00e3\u0081\u00a8\u00e3\u0081\u2020\u00e3\u0081\u00b8\u00e3\u201a\u201c\u00e3\u0081\u2022\u00e3\u201a\u201c\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u2018\u00e3\u0081\u201e – isoceles triangle
\n\u00e7\u203a\u00b4\u00e8\u00a7\u2019\u00e4\u00b8\u2030\u00e8\u00a7\u2019\u00e5\u00bd\u00a2 – \u00e3\u0081\u00a1\u00e3\u201a\u2021\u00e3\u0081\u00a3\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u2022\u00e3\u201a\u201c\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u2018\u00e3\u0081\u201e – right triangle (\u00e3\u20ac\u0152\u00e7\u203a\u00b4\u00e8\u00a7\u2019 – \u00e3\u0081\u00a1\u00e3\u201a\u2021\u00e3\u0081\u00a3\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u20ac\u008dis right angle)
\n\u00e7\u203a\u00b4\u00e8\u00a7\u2019\u00e4\u00ba\u0152\u00e7\u00ad\u2030\u00e8\u00be\u00ba\u00e4\u00b8\u2030\u00e8\u00a7\u2019 – \u00e3\u0081\u00a1\u00e3\u201a\u2021\u00e3\u0081\u00a3\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u00ab\u00e3\u0081\u00a8\u00e3\u0081\u2020\u00e3\u0081\u00b8\u00e3\u201a\u201c\u00e3\u0081\u2022\u00e3\u201a\u201c\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u2018\u00e3\u0081\u201e – isoceles right triangle<\/p>\n

\u00e9\u00bb\u201e\u00e9\u2021\u2018\u00e5\u203a\u203a\u00e8\u00a7\u2019\u00e5\u00bd\u00a2 – \u00e3\u0081\u0160\u00e3\u0081\u2020\u00e3\u0081\u201d\u00e3\u201a\u201c\u00e3\u0081\u2014\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u2018\u00e3\u0081\u201e – golden rectangle
\n\u00e5\u008f\u00b0\u00e5\u00bd\u00a2 – \u00e3\u0081\u00a0\u00e3\u0081\u201e\u00e3\u0081\u2018\u00e3\u0081\u201e – trapezoid
\n\u00e5\u00b9\u00b3\u00e8\u00a1\u0152\u00e5\u203a\u203a\u00e8\u00be\u00ba\u00e5\u00bd\u00a2 – \u00e3\u0081\u00b8\u00e3\u0081\u201e\u00e3\u0081\u201c\u00e3\u0081\u2020\u00e3\u0081\u2014\u00e3\u0081\u00b8\u00e3\u201a\u201c\u00e3\u0081\u2018\u00e3\u0081\u201e – a parallelogram
\n\u00e8\u008f\u00b1\u00e5\u00bd\u00a2 – \u00e3\u0081\u00b2\u00e3\u0081\u2014\u00e3\u0081\u0152\u00e3\u0081\u0178 – a rhombus
\n\u00e5\u2021\u00a7\u00e5\u017e\u2039 – \u00e3\u0081\u0178\u00e3\u0081\u201c\u00e3\u0081\u0152\u00e3\u0081\u0178 – kite shape<\/p>\n

Of course, there are a variety of other two dimensional figures, some of which I will list here:<\/p>\n

\u00e6\u00a5\u2022\u00e5\u2020\u2020 – \u00e3\u0081\u00a0\u00e3\u0081\u02c6\u00e3\u201a\u201c – ellipse
\n\u00e4\u00ba\u201d\u00e8\u0160\u2019\u00e6\u02dc\u0178 – \u00e3\u0081\u201d\u00e3\u0081\u00bc\u00e3\u0081\u2020\u00e3\u0081\u203a\u00e3\u0081\u201e – pentagram
\n\u00e5\u2026\u00ad\u00e8\u0160\u2019\u00e6\u02dc\u0178 – \u00e3\u201a\u008d\u00e3\u0081\u008f\u00e3\u0081\u00bc\u00e3\u0081\u2020\u00e3\u0081\u203a\u00e3\u0081\u201e – six pointed star\/star of david
\n\u00e3\u0192\u008f\u00e3\u0192\u00bc\u00e3\u0192\u02c6\u00e5\u00bd\u00a2 – \u00e3\u0081\u00af\u00e3\u0192\u00bc\u00e3\u0081\u00a8\u00e3\u0081\u0152\u00e3\u0081\u0178 – heart shape<\/p>\n

Not shapes, but two dimensional lines:
\n\u00e5\u008f\u0152\u00e6\u203a\u00b2\u00e7\u00b7\u0161 – \u00e3\u0081\u009d\u00e3\u0081\u2020\u00e3\u0081\u008d\u00e3\u201a\u2021\u00e3\u0081\u008f\u00e3\u0081\u203a\u00e3\u201a\u201c – hyperbola
\n\u00e6\u201d\u00be\u00e7\u2030\u00a9\u00e7\u00b7\u0161 – \u00e3\u0081\u00bb\u00e3\u0081\u2020\u00e3\u0081\u00b6\u00e3\u0081\u00a4\u00e3\u0081\u203a\u00e3\u201a\u201c – parabola<\/p>\n

There are many other shapes, but I think this covers the basic geometric shapes of particular mathematical significance fairly well.<\/p>\n","protected":false},"excerpt":{"rendered":"

Although they may already be familiar, it is important to be sure you know the basic geometric shapes: \u00e5\u2020\u2020\u00e5\u00bd\u00a2 – \u00e3\u0081\u02c6\u00e3\u201a\u201c\u00e3\u0081\u2018\u00e3\u0081\u201e – a circle \u00e4\u00b8\u2030\u00e8\u00a7\u2019\u00e5\u00bd\u00a2 – \u00e3\u0081\u2022\u00e3\u201a\u201c\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u2018\u00e3\u0081\u201e – a triangle \u00e6\u00ad\u00a3\u00e6\u2013\u00b9\u00e5\u00bd\u00a2 – \u00e3\u0081\u203a\u00e3\u0081\u201e\u00e3\u0081\u00bb\u00e3\u0081\u2020\u00e3\u0081\u2018\u00e3\u0081\u201e – a square \u00e5\u203a\u203a\u00e8\u00a7\u2019\u00e5\u00bd\u00a2 – \u00e3\u0081\u2014\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u2018\u00e3\u0081\u201e – a quadrilateral \u00e9\u2022\u00b7\u00e6\u2013\u00b9\u00e5\u00bd\u00a2 – \u00e3\u0081\u00a1\u00e3\u201a\u2021\u00e3\u0081\u2020\u00e3\u0081\u00bb\u00e3\u0081\u2020\u00e3\u0081\u2018\u00e3\u0081\u201e – a rectangle \u00e4\u00ba\u201d\u00e8\u00a7\u2019\u00e5\u00bd\u00a2 – \u00e3\u0081\u201d\u00e3\u0081\u2039\u00e3\u0081\u008f\u00e3\u0081\u2018\u00e3\u0081\u201e – a pentagon \u00e5\u2026\u00ad\u00e8\u00a7\u2019\u00e5\u00bd\u00a2 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-84","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"http:\/\/www.technicaljapanese.com\/index.php?rest_route=\/wp\/v2\/posts\/84","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.technicaljapanese.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.technicaljapanese.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.technicaljapanese.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.technicaljapanese.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=84"}],"version-history":[{"count":3,"href":"http:\/\/www.technicaljapanese.com\/index.php?rest_route=\/wp\/v2\/posts\/84\/revisions"}],"predecessor-version":[{"id":134,"href":"http:\/\/www.technicaljapanese.com\/index.php?rest_route=\/wp\/v2\/posts\/84\/revisions\/134"}],"wp:attachment":[{"href":"http:\/\/www.technicaljapanese.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=84"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.technicaljapanese.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=84"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.technicaljapanese.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=84"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}