<p><img data-attachment-id="6477" data-permalink="https://www.eskyjapan.com/method/ogi_form/attachment/75108716352712a126f8df84d3c880a6_s/" data-orig-file="https://i0.wp.com/www.eskyjapan.com/wp-content/uploads/2018/02/75108716352712a126f8df84d3c880a6_s.jpg?fit=640%2C427&;ssl=1" data-orig-size="640,427" data-comments-opened="0" data-image-meta="{";aperture";:";0";,";credit";:";";,";camera";:";";,";caption";:";";,";created_timestamp";:";0";,";copyright";:";";,";focal_length";:";0";,";iso";:";0";,";shutter_speed";:";0";,";title";:";";,";orientation";:";0";}" data-image-title="75108716352712a126f8df84d3c880a6_s" data-image-description="" data-image-caption="" data-medium-file="https://i0.wp.com/www.eskyjapan.com/wp-content/uploads/2018/02/75108716352712a126f8df84d3c880a6_s.jpg?fit=300%2C200&;ssl=1" data-large-file="https://i0.wp.com/www.eskyjapan.com/wp-content/uploads/2018/02/75108716352712a126f8df84d3c880a6_s.jpg?fit=637%2C425&;ssl=1" class="aligncenter size-full wp-image-6477" src="https://www.eskyjapan.com/wp-content/uploads/2018/02/75108716352712a126f8df84d3c880a6_s.jpg" alt="ãããå½¢é¢ç©ã®è¶ ç°¡åãªæ±ãæ¹" width="640" height="427" /><br />

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<p>ä¸å¦çããããªãããã£ã¨å½¹ã«ç«ã¡ã¾ãã®ã§1ç¹ã§ãå¤ãå¾ç¹ãã¦ãã ããã<br />
åºæ¬ã¯å¤§åã§ããåºæ¬ãç¥ã£ãä¸ã§ãã®æ¹æ³ãæ´»ç¨ãã¦ã¿ã¾ãããã<br />
ãã©ããã»ã©ç°¡åã§å¤§å¹ ãªæéç縮ãã§ããã®ã§æ¯éè¦ãã¦ããã¦ãã ããã</p>
<h3 class="style3b">ãããå½¢ã®é¢ç©ãæ±ããåé¡</h3>
<p><img data-attachment-id="6476" data-permalink="https://www.eskyjapan.com/method/ogi_form/attachment/ougi1/" data-orig-file="https://i0.wp.com/www.eskyjapan.com/wp-content/uploads/2018/02/ougi1.jpg?fit=640%2C420&;ssl=1" data-orig-size="640,420" data-comments-opened="0" data-image-meta="{";aperture";:";0";,";credit";:";";,";camera";:";";,";caption";:";";,";created_timestamp";:";0";,";copyright";:";";,";focal_length";:";0";,";iso";:";0";,";shutter_speed";:";0";,";title";:";";,";orientation";:";0";}" data-image-title="ougi1" data-image-description="" data-image-caption="" data-medium-file="https://i0.wp.com/www.eskyjapan.com/wp-content/uploads/2018/02/ougi1.jpg?fit=300%2C197&;ssl=1" data-large-file="https://i0.wp.com/www.eskyjapan.com/wp-content/uploads/2018/02/ougi1.jpg?fit=640%2C420&;ssl=1" class="aligncenter size-full wp-image-6476" src="https://www.eskyjapan.com/wp-content/uploads/2018/02/ougi1.jpg" alt="" width="640" height="420" /><br />
åå¾OAã10cmã弧ABã15cmã®ãããå½¢ã<br />
ä¸å¿è§ θ ã®è§åº¦ã¯ä¸æã<br />
ãã®ãããå½¢ã®é¢ç©ãæ±ããªããã<br />
â»ãã ãåå¨çã¯3.14ã¨ããã</p>
<blockquote><p>ãããå½¢ã®é¢ç©ãæ±ããå ¬å¼<br />
åå¾ × åå¾ × åå¨ç × ä¸å¿è§ / 360°</p></blockquote>
<h4 class="style4a">å ¬å¼ã®è§£ãæ¹</h4>
<p>ä¸å¿è§ã®θãããããªãã®ã§ããã®ã¾ã¾ã ã¨å ¬å¼ã使ããã¨ãã§ãã¾ããã<br />
ä¸å¿è§ã®θãæ±ããããã«ããããå½¢ã®å¼§ã®é·ããæ±ããå ¬å¼ãä½ãã¾ãã</p>
<blockquote><p>ãããå½¢ã®å¼§ã®é·ããæ±ããå ¬å¼<br />
ç´å¾ × åå¨ç × ä¸å¿è§ / 360°</p></blockquote>
<p>20cm × 3.14 × θ / 360° = 15cm<br />
ãã®æ¹ç¨å¼ã解ãã¨ï½¥ï½¥ï½¥<br />
θ = ï¼ 15 × 360 ) ÷ ï¼ 20 × 3.14 ï¼<br />
θ = 13500 / 157<br />
ã¡ãã£ã¨ãããããã§ãããä¸å¿è§ã® θ ããããã¾ããã®ã§ããããå½¢ã®é¢ç©ãæ±ããå ¬å¼ã«ãã¦ã¯ãã¾ãã<br />
10cm × 10cm × 3.14 × ï¼13500° / 157 ÷ 360°ï¼<br />
= 75cm2<br />
ãããã§ããã§ãããããéä¸ã¯ã©ããªããã¨ãã¨æãã¾ããããæå¾ã«ã¯ç¶ºéºãªæ°åãåºã¦ãã¦å©ããã¾ããã<br />
ã§ãæ£ããçãã¯åºã¾ããããããªãé¢åã ãæéããããããã¾ãã<br />
ãããã次ã¯ç¬æã«è§£ãæ¹æ³ãç´¹ä»ãã¾ãã</p>
<h3 class="style3b">ãããå½¢ã¯ä¸è§å½¢ã¨åã</h3>
<p>ãããå½¢ã¨ä¸è§å½¢ã¯ãåãã ã¨èãã¦å¤§ä¸å¤«ã</p>
<p>ãã¯ãï¼ãã£ã¦æãã§ããä¿¡ãããã®ã¯æããã¾ãã</p>
<blockquote><p>ä¸è§å½¢ã®é¢ç©ã®æ±ãæ¹<br />
åºè¾º × é«ã ÷ 2</p></blockquote>
<p><img data-attachment-id="6476" data-permalink="https://www.eskyjapan.com/method/ogi_form/attachment/ougi1/" data-orig-file="https://i0.wp.com/www.eskyjapan.com/wp-content/uploads/2018/02/ougi1.jpg?fit=640%2C420&;ssl=1" data-orig-size="640,420" data-comments-opened="0" data-image-meta="{";aperture";:";0";,";credit";:";";,";camera";:";";,";caption";:";";,";created_timestamp";:";0";,";copyright";:";";,";focal_length";:";0";,";iso";:";0";,";shutter_speed";:";0";,";title";:";";,";orientation";:";0";}" data-image-title="ougi1" data-image-description="" data-image-caption="" data-medium-file="https://i0.wp.com/www.eskyjapan.com/wp-content/uploads/2018/02/ougi1.jpg?fit=300%2C197&;ssl=1" data-large-file="https://i0.wp.com/www.eskyjapan.com/wp-content/uploads/2018/02/ougi1.jpg?fit=640%2C420&;ssl=1" class="aligncenter size-full wp-image-6476" src="https://www.eskyjapan.com/wp-content/uploads/2018/02/ougi1.jpg" alt="" width="640" height="420" /><br />
ä»åã®å³ãå½ã¦ã¯ããã¨ï½¥ï½¥ï½¥<br />
åºè¾ºã¯å¼§ã®é·ãã§ãé«ãã¯åå¾ã ãã･･･<br />
15cm × 10cm ÷ 2<br />
= 75cm2<br />
é£ããè¨ç®ããªãã¦ããç°¡åã«é¢ç©ãã§ã¾ãã</p>
<blockquote><p>ãããå½¢ã®é¢ç©ãæ±ããå ¬å¼<br />
弧ã®é·ã × åå¾ ÷ ï¼</p></blockquote>
<p>
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- 8年 ago
葉隠 瀧
Categories:
方法、手法
おうぎ形面積の超簡単な求め方
Tags: おうぎ形の面積
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