The diameter or circumference is one dimension stems (trees) that determine the cross-sectional area while standing tree trunks form of logs.<\/span> Even the volume to continue until the tree trunk standing or felled.<\/span> To provide a deeper understanding about the diameter of a circle, below are pictures diameter and circles.<\/span> From Figure 1 can be learned about the concept and the diameter of the circle, namely:<\/span>
\n<\/a>
\n Figure 1. The diameter and Circles<\/span><\/p>\n

Let’s just say there are two point S and the point P with a distance of r.<\/span> Then point S is moved clockwise to the point P fixed to the position (1), then it will form a circular arc with an angle of \u03b1.<\/span> Furthermore, continue to move into position (2).<\/span> When point S at the position (2), then the distance from the initial position (0) and position (2) 2r along a straight line and the angle \u03b1 formed by 180 \u00b0.<\/span> This distance is expressed as the diameter of the notation D = 2r.<\/span><\/p>\n

Point S moves back to starting position and finally resting back at the starting position (0).<\/span> This means that the point S in an arc on a plane at an angle of 360 \u00b0.<\/span> The arc shaped expressed as a circle.<\/span> By paying attention to the concept and the diameter of the circle, what conclusions can be obtained?<\/span> Along with an explanation of the diameter and circle above, then:<\/span>
\n (A) diameter rod is a straight line connecting two points on the edge of the stem and through the stem axis.<\/span>
\n (B) The circle (around) the rod is circular arc line length rods.<\/span><\/p>\n

In the formula tree basal area there is value \u03c0, which amount has been a constant in the whole world, which is 22\/7 or 3.14.<\/span> The question that arises in our mind next is: how the value of \u03c0 is obtained?<\/span> To be able to answer that question, let’s look at a picture of determining the value \u03c0 and the following explanation.<\/span>
\n<\/a>
\n Figure 2. Determination of Value \u03c0<\/span><\/p>\n

From Figure 2 can be learned about the concept of the amount of the value of \u03c0, namely:<\/span>
\n Point S moves from the initial position (0) around the point P clockwise by a distance r unit to the farthest point, namely the position (2) to permit distance of 2r unit (D unit).<\/span><\/p>\n

From the description of the concept of the amount of the value of \u03c0 above, then:<\/span>
\n (A) The formula for calculation of the circumference.<\/span>
\n<\/a><\/p>\n

(B) diameter calculation formula.<\/span>
\n<\/a>
\n Where,<\/span>
\n K = circumference (cm)<\/span>
\n D = diameter of the circle (cm)<\/span><\/p>\n

In addition to the purposes of estimating the dimensions of other trees, diameter at breast height (dbh) is usually measured as a basis for further calculation purposes, for example to determine the basal area.<\/span> Tree basal area is the rod cross-sectional area, so it can be expressed as:<\/span>
\n<\/a>
\n Where,<\/span>
\n B = basal area (cm2).<\/span>
\n \u03c0 = or 3.14.<\/span>
\n D = diameter at breast height (cm).<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

The diameter or circumference is one dimension stems (trees) that determine the cross-sectional area while standing tree trunks form of logs. Even the volume to continue until the tree trunk standing or felled. To provide a deeper understanding about the diameter of a circle, below are pictures diameter and circles. From Figure 1 can be …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1865],"tags":[2304,2306,2311,2307,2313,2309,2312,2308,2305,2310],"class_list":["post-1640","post","type-post","status-publish","format-standard","hentry","category-english","tag-tree-trunk","tag-tree-trunk-coffee-table","tag-tree-trunk-drawing","tag-tree-trunk-legs","tag-tree-trunk-planter","tag-tree-trunk-protector","tag-tree-trunk-removal","tag-tree-trunk-slices","tag-tree-trunk-table","tag-tree-trunks-adventure-time"],"_links":{"self":[{"href":"https:\/\/www.tneutron.net\/sipil\/wp-json\/wp\/v2\/posts\/1640","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tneutron.net\/sipil\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tneutron.net\/sipil\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tneutron.net\/sipil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tneutron.net\/sipil\/wp-json\/wp\/v2\/comments?post=1640"}],"version-history":[{"count":1,"href":"https:\/\/www.tneutron.net\/sipil\/wp-json\/wp\/v2\/posts\/1640\/revisions"}],"predecessor-version":[{"id":3536,"href":"https:\/\/www.tneutron.net\/sipil\/wp-json\/wp\/v2\/posts\/1640\/revisions\/3536"}],"wp:attachment":[{"href":"https:\/\/www.tneutron.net\/sipil\/wp-json\/wp\/v2\/media?parent=1640"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tneutron.net\/sipil\/wp-json\/wp\/v2\/categories?post=1640"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tneutron.net\/sipil\/wp-json\/wp\/v2\/tags?post=1640"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}