Cho ∆ABC nhọn, A = α 1. C/m : S∆ABC = ½ AB . AC . Sin α ( Áp dụng tính: AB = 12cm; AC = 10√3cm; α = 60'(độ) . 2. AD là phân giác ∆ABC, C/m: AD = ( AB . AC . Sin α ) / [AB + AC . Sin (α/2) ] ( Áp dụng tính AD vs số liệu ở phần 1 ) .

Hình thang ABCD có góc A= góc D=90°, đáy nhỏ AB=11cm,AD=12cm,BC=13cm. Tính độ dài AC

Cho em hỏi ạ. Câu khống chế là câu như nào ạ?

Cần gấp nhà mng 🙏🙏🙏🙏🙏🙏😭😭 Xét tính đồng biến nghịch biến

CMR: $\frac{a^4}{(1+b)(1+c)}$ + $\frac{b^4}{(1+b)(1+c)}$ + $\frac{c^4}{(1+b)(1+c)}$ $\geq$ 3/4 Với a,b,c>0 và abc=1

So sánh cách tính lịch Phương Đông và phương Tây,bên nào tính lịch chính xác hơn? vì sao?

Thien Mu Pagoda was originally founded in 1601 by Nguyen Hoang, governor of Thuan Hoa province. Over the centuries its buildings have been destroyed and rebuilt several times. Since the 1960s it has been a flashpoint of political demonstrations. To the right of the brick pagoda tower is a pavilion containing a stele dating from 1715. It’s set on the back of a massive marble turtle, a symbol of longevity. To the left of the tower is another six-sided pavilion, this one sheltering an enormous bell (1710), weighing 2052kg and audible from 10km away.The temple itself is a humble building in the inner courtyard, past the triple-gated entrance where three statues of Buddhist guardians stand at the alert. In the main sanctuary behind the bronze laughing Buddha are three statues: A Di Da, the Buddha of the Past; Thich Ca, the historical Buddha (Sakyamuni); and Di Lac Buddha, the Buddha of the Future. For a scenic bicycle ride, head southwest (parallel to the Perfume River) on riverside Ð Tran Hung Dao, which turns into Ð Le Duan after Phu Xuan Bridge. Cross the railway tracks and keep going on Ð Kim Long. Thien Mu Pagoda can also be reached by boat. I)T or F 1-The pagoda was originally constructed in the 16th century 2-The pagoda has never suffered from any damages. 3-The stele in the pavilion to the right of the tower dated from 1750. 4-The main features of the temple are the Buddhist statues. 5-Visitors can visit the Pagoda by different vehicles. II)Answer the questions 1-What did the pagoda use to be the flashpoint of? 2-What does the massive marble turtle symbolize? 3-What is there in the six-sided pavilion to the left of the tower? 4-Where is the temple? 5-What are there at the triple-gated entrance? AI LAM NHANH EM VOTE 5S

Trong câu Many ethnic groups managed to live together peaceful. Giải thích vì sao phải điền peaceful

Cho đa thức bậc 2 `ax^2+bx+c`. CMR: a) Nếu `b^2\ne 4ac` thì `ax^2+bx+c=a(x-(-b+\sqrt(b^2-4ac))/2a)(x-(-b-\sqrt(b^2-4ac))/2a)` b) Nếu `b^2=4ac` hay `\Delta=0` thì `ax^2+bx+c=a(x+b/(2a))^2`

Vẽ anime nha ....... Chỉ vào cách tán gái