cho tam giác ABC vuông A(AB>AC) đường trung tuyến AO.tia đối của tia OA lấy D sao cho OD=OA
a/CMR : ABCD là hcn
b/từ B kẻ BH vuông góc với AD tại H,C kẻ CK vuông góc AD tại K.CMR BH=CK ,BK=CH
c/tia BH cắt CD ở M ,tia CK cắt AB ở N CMR M,O,N thẳng hàng
d/trên tia đối BH lấy E sao cho BE=AD.CMR góc DCE=45 độ
a) xét tứ giác ABCD:
BC CẮT AD TẠI O
O LÀ TRUNG ĐIỂM BC, O LÀ TRUNG ĐIỂM AD => TỨ GIÁC LÀ HBH
TỨ GIÁC LẠI CÓ GÓC A=90 => ABCD LÀ HÌNH CHỮ NHẬT
B) XÉT TAM GIÁC BOH VÀ TAM GIÁC COK:
GÓC H= GÓC K =90
OB=OC
2 GOC TẠI ĐỈNH O ĐỐI ĐỈNH = NHAU
=> 2 TAM GIÁC BẰNG NHAU (CH.GN) => OH=OK=> O LÀ TĐ HK
=> BHCK LÀ HBH (CẮT NHAU TẠI TĐ MỖI ĐG)= > BH=CK; BK=CH
C) XÉT TỨC GIÁC BMCN
ĐÃ CÓ BM//CN( BH//CK)
BN//MC (AB//CD) => BMCN LÀ HBH. O LÀ TRUNG ĐIỂM BC => CŨNG PHẢI LÀ TRUNG ĐIỂM MN => O,M,N THẲNG HÀNG
D)![](data:image/png;base64,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)
ê cho hỏi nha, sao trên tia đối của tia BH thì tia BE bắt đầu từ B và B nằm giữa E,H chớ