\(\bigtriangleup{ABC}\) \(, \) các đường trung tuyến BD , CE cắt nhau ở G cho BD < CE , so sánh \(\widehat{GBC} \) và \(\widehat{GCB}\)

Give the correct form of the word in brackets to complete the following sentences :

1. The concert will raise money for local _____ . ( charitable )

2. A gentle form of exercise will increase your _____ to relax . ( able )

3. Computerization has _____ us to do away with a lot of paperwork . ( able )

4. The work of the charity is funded by voluntary _____ . ( donate )

5. Three hundreds people were left _____ by the earthquake . ( home )

6. What's the _____ between an ape and a monkey ? ( different )

7. The article was about the international aid _____ . ( organize )

8. They chose to take _____ redundancy . ( volunteer )

9. He was not asked to leave - he went _____ . ( volunteer )

10. He was _____ in a car accident . ( able )

Cho tam giác nhọn ABC , \(\widehat{A} = 75^0 , AB = 30\) mm ; BC = 35 mm . Hãy giải tam giác ABC ( làm tròn đến hàng đơn vị )

Cho tam giác ABC vuông tại A . Gọi M, N lần lượt là hai điểm trên cạnh AB và AC sao cho AM = \(\dfrac{1}{3}\) AB và \(AN = \dfrac{1}{3} AC\) . Biết độ dài BN = sin\(\alpha\) , \(CM = cos\alpha\) với \(0^0 <\alpha <90^0\) . Tính cạnh huyền BC

Cho \(\bigtriangleup {ABC}\) và điểm \(D \) nằm trong \(\bigtriangleup\) đó . Chứng minh rằng : Nếu \(AD = AB\) thì \(AB < AC\) .