Các câu hỏi tương tự
Cau 5: Trong cac khang dinh sau, khang dinh nao dung, khang dinh nao sai?1.Ba diem phan biet la ba diem thang hang.2.Voi ba diem phan biet luon co hai diem nam ve cung phia doi voi diem con lai.3.Voi ba diem thang hang phan biet luon co hai diem nam khac phia voi diem con lai.4.Voi ba diem A,B,C thang hang thi diem B luon nam giua hai diem A,C.5.Co mot va chi mot duong thang di qua hai diem (phan biet) cho truoc.6.Hai duong thang phan biet thi song song voi nhau.7.Hai tia chung goc thi cung nam...
Đọc tiếp
Cau 5: Trong cac khang dinh sau, khang dinh nao dung, khang dinh nao sai?
1.Ba diem phan biet la ba diem thang hang.
2.Voi ba diem phan biet luon co hai diem nam ve cung phia doi voi diem con lai.
3.Voi ba diem thang hang phan biet luon co hai diem nam khac phia voi diem con lai.
4.Voi ba diem A,B,C thang hang thi diem B luon nam giua hai diem A,C.
5.Co mot va chi mot duong thang di qua hai diem (phan biet) cho truoc.
6.Hai duong thang phan biet thi song song voi nhau.
7.Hai tia chung goc thi cung nam tren mot duong thang.
8.Hai tia chung goc thi doi nhau
9.Neu diem M nam giua diem A,B thi no la trung diem cua doan thang AB.
10.Neu MA=MB thi M la trung diem cua doan thang AB.
11.Neu MA+MB= AB va MA=MB thi M la trung diem cua doan thang AB.
dien vao cho trong cho cac phat bieu sau:
a)hinh tao thanh boi diem O va 1 phan duong thang bi chia ra boi diem Oduoc goi la 1 .......................
b)diem R bat ki nam tren duong thang xy la goc chung cua.............................
c)neu diem A nam giua 2 diem B va C thi:
-hai tia............................doi nhau
-hai tia CA va ..........................................trung nhau
-hai tia BAva BC ...............................
ve doan AB= 6cm . tren tia AB ve diem M sao cho AM 3cm
trong 3 diem A,B,M diem nao nam giua hai diem con lai
tinh do dai doan thang MB so sanh MB va MA
diem M co la trung diem cua doan thang AB khong . Vi sao
tren tia doi cua tia BA lay diem I sao cho B la trung diem cua MC . tren tia oi cua tia AB lay diem K sao cho A la trung diem cua MK . M co la trug diem cua IK khong . Vi sao
Cho goc xOy va goc yOz ke bu nhau, ve tia Om la tia phan giac cua goc xOy va tia On la tia phan giac cua goc yOz
a) Tinh goc mOn.
b) Ve tia Om' la tia doi cua tia Om, neu goc zOm' = 30 do. Tinh goc m'Oy.
c) Ve duong thang d khong di qua diem O, tren duong thang d lay 2015 diem phan biet. Tinh so goc co dinh la diem O va cac canh di qua 2015 diem tren duong thang d.
Cho goc xOy va goc yOz ke bu nhau, ve tia Om la tia phan giac cua goc xOy va tia On la tia phan giac cua goc yOz
a) Tinh goc mOn.
b) Ve tia Om' la tia doi cua tia Om, neu goc zOm' = 30 do. Tinh goc m'Oy.
c) Ve duong thang d khong di qua diem O, tren duong thang d lay 2015 diem phan biet. Tinh so goc co dinh la diem O va cac canh di qua 2015 diem tren duong thang d.
5. Dien de duoc phat bieu dunga)Mot phan duong thang bi chia ra boi diem O cung voi diem O duoc goi la mot ...b)Hinh tao boi diem O va mot phan duong thang chua tat ca cac diem nam cung phia la mot ...c)Neu diem O nam tren duong thang xy thi diem O la goc chung cuad)Hinh gom hai diem ... va tat ca cac diem nam giua ... duoc goi la doan thang RS. Hai diem ... duoc goi la hai mut cua doan thang RS.e)Khi MP+MKPK thi .........f)Diem M la trung diem AB neu M ...... A, B va ..... cach deu ........
Đọc tiếp
5. Dien de duoc phat bieu dung
a)Mot phan duong thang bi chia ra boi diem O cung voi diem O duoc goi la mot ...
b)Hinh tao boi diem O va mot phan duong thang chua tat ca cac diem nam cung phia la mot ...
c)Neu diem O nam tren duong thang xy thi diem O la goc chung cua
d)Hinh gom hai diem ... va tat ca cac diem nam giua ... duoc goi la doan thang RS. Hai diem ... duoc goi la hai mut cua doan thang RS.
e)Khi MP+MK=PK thi .........
f)Diem M la trung diem AB neu M ...... A, B va ..... cach deu ........
trong cac khang dinh sau khang dinh nao dung A)2 tia chung goc la 2 tia doi nhau B)2 duong thang phan biet thi k co diem chung C)neu M la trung diem cua doan thang AB thi MA=MB D)co it nhat 1 duong thang di qua 2 diem A va B
cho tam giac ABC co BC=4cm. tren tia doi cua tia BC lay diem D sao cho BD=2cm/ a, tinh do dai CD; b,goi M la chung diem cua CD.tinh do dai BM;c,biet goc DAC bang 112 do .Ãxtia phan giac cua goc BAC va goc BAD. tinh so do goc xAy;d, tren nua mat phang bo la duong thang AC co chua diem D neu ve them n tia goc A phan biet khong trung voi cac tia ÂC,Ã,AB,Ay,AD thi co tat ca bao nhieu goc dinh A va Ay thu tu la
1.Tim cac so tu nhien x sao cho:a/6 chia het cho (x-1) b/14 chia het cho (2.x+3)2.Ve hinh de thay rang moi cau sau day la saia/Hai tia chung goc luon la hai tia doi nhaub/Hai tia chung goc luon la hai tia trung nhauc/Hai tia chung hoc luon la hai tia phan bietd/Hai tia co nhieu diem chung chi khi chung la hai tia trung nhaue/Hai tia phan biet va co chung goc luon la hai tia doi nhauf/Hai tia ko chung goc luon la hai tia khong co diem chung3/a/Ve 3 diem thang...
Đọc tiếp
1.Tim cac so tu nhien x sao cho:
a/6 chia het cho (x-1) b/14 chia het cho (2.x+3)
2.Ve hinh de thay rang moi cau sau day la sai
a/Hai tia chung goc luon la hai tia doi nhau
b/Hai tia chung goc luon la hai tia trung nhau
c/Hai tia chung hoc luon la hai tia phan biet
d/Hai tia co nhieu diem chung chi khi chung la hai tia trung nhau
e/Hai tia phan biet va co chung goc luon la hai tia doi nhau
f/Hai tia ko chung goc luon la hai tia khong co diem chung
3/
a/Ve 3 diem thang hang A,B,C sao cho diem B nam giua hai diem A,C.Sau do hay ke ten:cac tia,cac cap tia doi nhau,cac cap tia phan biet,cac cap tia trung nhau co trong hinh ve do.
b/Ve 4 diem A,B,C,D tren mot duong thang sao cho diem B nam giua hai diem A,C va diem C nam giua hai diem B,D.Sau do hay ke ten:cac tia,cac cap tia doi nhau,cac cap tia phan biet,cac cap tia trung nhau co trong hinh ve do.
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