20 1 1 Huairou Yimei Mathematics for Senior High School Entrance Examination 12.

Solution: Draw a circle with D as the center and the length of AD as the radius.

(1) when the circle is tangent to BC, when DE⊥BC,

∫∠ABC = 30，

∴DE= BD，

AB = 6，

∴ad=2；

② When the circle intersects BC, if the intersection point is B or C, then AD= AB=3.

The value range of ∴AD is 2 ≤ AD < 3. Comments: It is the key to solve this problem to distinguish the minimum and maximum ad by using the position relationship between BC and circle.

The little monkey ate four more peaches than the rest, and the little monkey ate another one, which was three times as much as the rest. How many peaches does the little monkey have?

Mathematics collection questions in college entrance examination

Synchronous detection of eighth grade mathematics (Zhejiang Education Edition) in the second semester of 20 10 school year —— An answer from SMJ (1678)

Is the education in Xuzhou Rong De good? I am a senior three this year. My English is poor. I want to make up for it by educating in Rong De, but I don't know how the teachers there are.

English Words for Grade Three People's Education Edition

How do college students review efficiently?

Will people who study painting have better spatial imagination?

Math Translation in Grade Two

Several rounds of review and content of mathematics in Changsha senior high school entrance examination

20 12 detailed explanation of the test questions and questions in the math league.