Tài liệu Giáo Án Dạy Thêm Hình Học 8 Chủ Đề Tứ Giác Và Hình Thang. Phân loại: Phổ thông > Toán > Lớp 8. Chủ đề: Toán, Toán 8. Có bản xem trước trang đầu dạng HTML và PDF để tham khảo nội dung.

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.document-html-preview--word div.Section0{page:Section0;}</style><div class="document-html-preview__page document-html-preview__page--word" data-page="1">CHUY&#202;N &#272;&#7872; 1: T&#7912; GI&#193;C V&#192; H&#204;NH THANG<o:p></o:p><o:p>&nbsp;</o:p>A/ L&#221; THUY&#7870;T.<o:p></o:p>I/ T&#7913; gi&#225;c.<o:p></o:p> * T&#7913; gi&#225;c ABCD l&#224; h&#236;nh g&#7891;m 4 &#273;o&#7841;n th&#7859;ng AB, BC, CD, DA, trong &#273;&#243; b&#7845;t k&#7923; hai &#273;o&#7841;n th&#7859;ng n&#224;o c&#361;ng kh&#244;ng c&#249;ng n&#7857;m tr&#234;n m&#7897;t &#273;&#432;&#7901;ng th&#7859;ng.<o:p></o:p> * T&#7913; gi&#225;c l&#7891;i l&#224; t&#7913; gi&#225;c lu&#244;n n&#7857;m trong m&#7897;t n&#7917;a m&#7863;t ph&#7859;ng c&#243; b&#7901; l&#224; &#273;&#432;&#7901;ng th&#7859;ng ch&#7913;a b&#7845;t k&#7923; c&#7841;nh n&#224;o c&#7911;a t&#7913; gi&#225;c.<o:p></o:p><img width="272" height="135" src="https://daythem.com/public/s3/user.document/user-system-generate/toan/lop-8/b38ef191c29ead/html-preview-assets/7794e86a3b6be97a7091.png" align="left" hspace="12" >* &#272;&#7883;nh l&#253;: T&#7893;ng c&#225;c g&#243;c c&#7911;a m&#7897;t t&#7913; gi&#225;c b&#7857;ng 1800<o:p></o:p>II/ H&#236;nh thang.<o:p></o:p>1. &#272;&#7883;nh ngh&#297;a:&nbsp;<o:p></o:p>T&#7913; gi&#225;c ABCD l&#224; h&#236;nh thang &nbsp;&nbsp;<img width="95" height="50" src="https://daythem.com/public/s3/user.document/user-system-generate/toan/lop-8/b38ef191c29ead/html-preview-assets/78aae56631c7ad68b30c.png" ><o:p></o:p><img width="242" height="163" src="https://daythem.com/public/s3/user.document/user-system-generate/toan/lop-8/b38ef191c29ead/html-preview-assets/a6410bc831d7ec91b825.png" align="left" hspace="12" >2.T&#237;nh ch&#7845;t: <o:p></o:p>N&#7871;u m&#7897;t h&#236;nh thang c&#243; hai c&#7841;nh &#273;&#225;y b&#7857;ng nhau th&#236; n&#243; l&#224; h&#236;nh b&#236;nh h&#224;nh.<o:p></o:p>3. H&#236;nh thang vu&#244;ng:<o:p></o:p>H&#236;nh thang vu&#244;ng l&#224; h&#236;nh thang c&#243; hai g&#243;c vu&#244;ng.<o:p></o:p>4. H&#236;nh thang c&#226;n.<o:p></o:p><img width="276" height="154" src="https://daythem.com/public/s3/user.document/user-system-generate/toan/lop-8/b38ef191c29ead/html-preview-assets/9f99ee17eb39cab63de3.png" align="left" hspace="12" >T&#7913; gi&#225;c ABCD l&#224; h&#236;nh thang c&#226;n &nbsp;&nbsp;<img width="92" height="85" src="https://daythem.com/public/s3/user.document/user-system-generate/toan/lop-8/b38ef191c29ead/html-preview-assets/877ba650d43ada8eaa4a.png" ><o:p></o:p>* T&#237;nh ch&#7845;t: Trong h&#236;nh thang c&#226;n:<o:p></o:p>+ Hai c&#7841;nh b&#234;n b&#7857;ng nhau<o:p></o:p>+ Hai &#273;&#432;&#7901;ng ch&#233;o b&#7857;ng nhau<o:p></o:p>* D&#7845;u hi&#7879;u nh&#226;n bi&#7871;t:<o:p></o:p>+ H&#236;nh thang c&#243; hai &#273;&#432;&#7901;ng ch&#233;o b&#7857;ng nhau l&#224; h&#236;nh thang c&#226;n.<o:p></o:p>+ H&#236;nh thang c&#243; hai g&#243;c chung m&#7897;t c&#7841;nh &#273;&#225;y b&#7857;ng nhau l&#224; h&#236;nh thang c&#226;n.<o:p></o:p></div></section>

Giáo Án Dạy Thêm Hình Học 8 Chủ Đề Tứ Giác Và Hình Thang

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