下面這題，你需要花多少時間來解題

解題概念/看到正方形，你就要知道----正方形切出來的三角形，都是全等三角形。

解題技巧/只要看到三角形，你就要知道----畢氏定理(AB2+BC2=CA2)

所以。答案就是2√13，你算出來了嗎?























<p class="lexical__paragraph" dir="ltr"><span style="white-space: pre-wrap;">下面這題，你需要花多少時間來解題</span></p><div class="lexical__image center"><div class="lexical__imageWrapper"><img src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2Fa67f4e89-b622-4892-8dac-914c7d00f722.png&amp;width=740&amp;sign=xGdY6jux-agbXqgtl3xAElbb8NBC23TfFcenQdrkJ6s" data-src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2Fa67f4e89-b622-4892-8dac-914c7d00f722.png&amp;width=740&amp;sign=xGdY6jux-agbXqgtl3xAElbb8NBC23TfFcenQdrkJ6s" class="lazy" data-original-src="https://images.vocus.cc/a67f4e89-b622-4892-8dac-914c7d00f722.png" data-lowquality="true" data-width="855" data-height="663" data-retry="0" onerror="Number(this.dataset.retry) > 4 ? this.src='/static/default-error-img.svg': (() => {this.src=this.dataset.originalSrc; this.dataset.retry = Number(this.dataset.retry)+1;})()" alt="求正方形的邊長"></div><div class="captionTheme__wrapper"><p class="captionTheme__paragraph">求正方形的邊長</p></div></div><p class="lexical__paragraph" dir="ltr"><b><strong class="lexical__textBold" style="white-space: pre-wrap;">解題概念</strong></b><span style="white-space: pre-wrap;">/看到正方形，你就要知道----正方形切出來的三角形，都是全等三角形。</span></p><div class="lexical__image center"><div class="lexical__imageWrapper"><img src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2F689bb17e-b7ae-4dd6-b8f4-ca18d93e0fd6.png&amp;width=740&amp;sign=SIWTPs1Yv8zfEa69DC8YpAo1jWIj7tkSVDcgoKkXv50" data-src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2F689bb17e-b7ae-4dd6-b8f4-ca18d93e0fd6.png&amp;width=740&amp;sign=SIWTPs1Yv8zfEa69DC8YpAo1jWIj7tkSVDcgoKkXv50" class="lazy" data-original-src="https://images.vocus.cc/689bb17e-b7ae-4dd6-b8f4-ca18d93e0fd6.png" data-lowquality="true" data-width="855" data-height="663" data-retry="0" onerror="Number(this.dataset.retry) > 4 ? this.src='/static/default-error-img.svg': (() => {this.src=this.dataset.originalSrc; this.dataset.retry = Number(this.dataset.retry)+1;})()" alt="三角形A=三角形B=三角形C=三角形D"></div><div class="captionTheme__wrapper"><p class="captionTheme__paragraph">三角形A=三角形B=三角形C=三角形D</p></div></div><div class="lexical__image center"><div class="lexical__imageWrapper"><img src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2F2c7043e7-801f-4765-9c49-8341ff9c2326.png&amp;width=740&amp;sign=W_sVJcPi4PP4jisUjobxNSpZceR_s-DeZTlmD2483_o" data-src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2F2c7043e7-801f-4765-9c49-8341ff9c2326.png&amp;width=740&amp;sign=W_sVJcPi4PP4jisUjobxNSpZceR_s-DeZTlmD2483_o" class="lazy" data-original-src="https://images.vocus.cc/2c7043e7-801f-4765-9c49-8341ff9c2326.png" data-lowquality="true" data-width="855" data-height="663" data-retry="0" onerror="Number(this.dataset.retry) > 4 ? this.src='/static/default-error-img.svg': (() => {this.src=this.dataset.originalSrc; this.dataset.retry = Number(this.dataset.retry)+1;})()" alt="三角形E=三角形F=三角形G=三角形H"></div><div class="captionTheme__wrapper"><p class="captionTheme__paragraph">三角形E=三角形F=三角形G=三角形H</p></div></div><div class="lexical__image center"><div class="lexical__imageWrapper"><img src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2F85de9e39-410f-4cbb-a432-8fcb5bf45694.png&amp;width=740&amp;sign=wDDRfC5ZvQalEz2vej3tWQ0mr39E88IA25U_p9dMOUg" data-src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2F85de9e39-410f-4cbb-a432-8fcb5bf45694.png&amp;width=740&amp;sign=wDDRfC5ZvQalEz2vej3tWQ0mr39E88IA25U_p9dMOUg" class="lazy" data-original-src="https://images.vocus.cc/85de9e39-410f-4cbb-a432-8fcb5bf45694.png" data-lowquality="true" data-width="855" data-height="663" data-retry="0" onerror="Number(this.dataset.retry) > 4 ? this.src='/static/default-error-img.svg': (() => {this.src=this.dataset.originalSrc; this.dataset.retry = Number(this.dataset.retry)+1;})()" alt="raw-image"></div><div></div></div><p class="lexical__paragraph" dir="ltr"><b><strong class="lexical__textBold" style="white-space: pre-wrap;">解題技巧</strong></b><span style="white-space: pre-wrap;">/只要看到直角三角形，你就要知道----畢氏定理(AB</span><sup style="white-space: pre-wrap;"><span class="lexical__textSuperscript">2</span></sup><span style="white-space: pre-wrap;">+BC</span><sup style="white-space: pre-wrap;"><span class="lexical__textSuperscript">2</span></sup><span style="white-space: pre-wrap;">=CA</span><sup style="white-space: pre-wrap;"><span class="lexical__textSuperscript">2</span></sup><span style="white-space: pre-wrap;">)</span></p><div class="lexical__image center"><div class="lexical__imageWrapper"><img src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2F71d1e8b5-9d71-4671-bc3c-31c23b1854c8.png&amp;width=466&amp;sign=FH2lZwoYikCtHi8qqcAHg-DThMJV_zfbArTyzIOEzn8" data-src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2F71d1e8b5-9d71-4671-bc3c-31c23b1854c8.png&amp;width=466&amp;sign=FH2lZwoYikCtHi8qqcAHg-DThMJV_zfbArTyzIOEzn8" class="lazy" data-original-src="https://images.vocus.cc/71d1e8b5-9d71-4671-bc3c-31c23b1854c8.png" data-lowquality="true" data-width="466" data-height="388" data-retry="0" onerror="Number(this.dataset.retry) > 4 ? this.src='/static/default-error-img.svg': (() => {this.src=this.dataset.originalSrc; this.dataset.retry = Number(this.dataset.retry)+1;})()" alt="raw-image"></div><div></div></div><p class="lexical__paragraph" dir="ltr"><span style="white-space: pre-wrap;">所以。答案就是2√13，你算出來了嗎?</span></p><div class="lexical__image center"><div class="lexical__imageWrapper"><img src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2F3427c06f-3814-45a0-a280-ade3469b6444.png&amp;width=740&amp;sign=InwwcKsS1TvGps_DoFCXMIsmbaKE2yqyvtmatRDUUbM" data-src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2F3427c06f-3814-45a0-a280-ade3469b6444.png&amp;width=740&amp;sign=InwwcKsS1TvGps_DoFCXMIsmbaKE2yqyvtmatRDUUbM" class="lazy" data-original-src="https://images.vocus.cc/3427c06f-3814-45a0-a280-ade3469b6444.png" data-lowquality="true" data-width="1167" data-height="600" data-retry="0" onerror="Number(this.dataset.retry) > 4 ? this.src='/static/default-error-img.svg': (() => {this.src=this.dataset.originalSrc; this.dataset.retry = Number(this.dataset.retry)+1;})()" alt="raw-image"></div><div></div></div><p class="lexical__paragraph" dir="ltr"><br></p><p class="lexical__paragraph" dir="ltr"><br></p><p class="lexical__paragraph" dir="ltr"><br></p><p class="lexical__paragraph" dir="ltr"><br></p><p class="lexical__paragraph" dir="ltr"><br></p><p class="lexical__paragraph" dir="ltr"><br></p><p class="lexical__paragraph" dir="ltr"><br></p><p class="lexical__paragraph" dir="ltr"><br></p><p class="lexical__paragraph" dir="ltr"><br></p><p class="lexical__paragraph" dir="ltr"><br></p><p class="lexical__paragraph" dir="ltr"><br></p>

解題技巧/10秒算出正方形的邊長