HOC24
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Cho hình thang MNPQ (MN//PQ), có MP = NQ. Qua N kẻ đường thẳng song song vớiMP, cắt đường thẳng PQ tại K. Chứng minh:a) MNPQ là hình thang cânb) ∆MPQ=∆NQPc)∆NKQ là tam giác cân
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cho e hỏi tại sao MN lại // với KP ạ
Bài 1: Cho hình thang cân ABCD (AB//CD) có AB=3,BC=CD=13(cm). Kẻ các đường cao AK và BH.
a) Chứng minh rằng CH=DK.
b) Tính độ dài BH.
cho hình thang ABCD có AB//CD(AB<CD).DB là tia phân giác của góc D.Tính các cạnh của hình thang biết chu vi hình thang bằng 20cm.Em cần gấp ạ.
Choose the correct answer
1. The Smiths aren’t painting/ weren’t painting their house last weekend
2. Tom cleaned/ was cleaning the living room when Jane arrived
3. Did/ Were the students writing an essay in class this morning?
4. Frank was fixing/ fixed his car when his mobile rang
5. Mark didn’t wear/ wasn’t wearing a coat when it started to rain.
6. He is/ was driving to work this morning when Anna called.
7. While my parents were working/ was working, I was studying at home
8. I walked/ was walking home when I tripped/ was tripping and fell
9. I was talking/ talked on the phone when she came/ was coming.
10. My brother falled / fell over while we was playing/ played outdoors.em cần gấp!!!
Chọn và điền giới từ chỉ chuyển động gợi ý phù hợp
1. I flew from San Francisco ______ Zurich with Swiss International Air Lines. (to/ into/ from)
2. Every morning I get ______ my bicycle and go to school. (over/ on/ in)
3. The cat was on the table; then it jumped ______ the table. (down/ out of/ off)
4. We got ______ the car and ran ______ the building. (down/ out of/ off - on/ into/ across)
5. He fell ______ his motorbike when he was riding very fast. (off/ below/ down)
6. The elevator didn't work and we had to walk ______ the stairs to the 15th floor. (past/ over/ up)
7. He escaped ______ a door in the back of the building. (through/ across/ into)
8. We took a boat ______ the river. (through/ across/ towards)
9. The robber broke his leg when he tried to jump ______ a wall. (towards/ through/ over)
10. He took the phone and threw it ______ the water. (into/ under/ on)E cần gấp!!!
tìm x,y,z biết: x:(-3)=y:5 và x+y=30
tìm các số tự nhiên x,y biết: 2022.|2x-1|+5.(x+2y)*2022=0
giúp em với ạ.Bài 4 ạ.
giúp em với ạ.