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183全等三角形的判定(一)(国外英文资料)
183全等三角形的判定(一)(国外英文资料)
When reading, I would like to stay in front of every good idea, just like staying in front of every truth. - Emerson
Determination of 18.3 congruent triangles (a)
The determination of teaching from the Shanghai Education Press seven grade eighteenth section of the third chapter congruent triangles (a) first class, I was teaching design from the following aspects.
Analysis of teaching materials:
The status and function of teaching materials: the experimental geometry is congruent triangles in the last chapter, is the entrance into the demonstration following content geometry learning. To determine the two triangles congruent reasoning, its essence is that the reasoning of the format is the format of the certificate of.
Master the judgment method of congruent triangles, on the one hand, to cultivate the students logical thinking ability, and ready to add in the future line, and the auxiliary line angle. This class is congruent triangles determine the first lesson, the first theorem of launch and application, make students understand what is the determination of congruent triangles, how to use the decision to prove congruent triangles two congruent triangles, how to correctly describe the process, laid a good foundation for the following study and application of other theorems.
Teaching objectives:
Knowledge goal: to learn the contents corner angle theorem, angular edge.
The flexible use of the corner angle theorem, angular edge inference to solve related problems.
Ability aim: through the angle corner theorem discovery, cultivate students observation, experiment, synthesis, analysis, generalization and geometric dynamic consciousness.
Through the corner corner theorem, using the angular edge inference to cultivate students logical thinking.
The emotion goal: to enable students to acquire knowledge of mathematical experience feelings in autonomous learning, cultivating students innovative thinking skills, multi-faceted.
The teaching focus: under
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