人教版小学数学四年级三角形的分类课件维语

1、1朱春林 四（2）班?蜸 ?phemia? me?筨? p蜸 ?p?蜸?i ?p筨p筨e 筨-1,6,a?5?p0p?p0,i ?6? ?p?蜸?i ?pphpp耀ai ?1?a? 5?1phm?pi ?1?0 ae?a?ai ?a1?i ?aip0?蜸 m0筨e ?p筨?ai ?i m?p?蜸 ?蜸?i m0筨e ?p筨?ai ?p?.2?訸010? o?0010? o? ?010o?m? ?筨me m?p?蜸 m0筨e ?p筨?ai ?蜸 m?p?蜸 m0筨e ?p筨?ai1-?1m0 000? ?pexe ?pex蜸?0灄焛0? i00灄? ?0r訸i? ?0?e 010o ?m訸i ?

2、010o ?0?0?0 ?r00i?0o r ?0?00 ?0?r訸-?0?r訸 ?訸010? o ?0010? o ? ?010o ?0?0?0 ?0r? ?r00i1灄?o 000?2-?1m03?p?蜸?i 3 ?phpp耀ai 筨a蜸: ?p?蜸?i(3) ?ep筨me 5 (3) 5?蜸 (3) ?pe6? 筨a蜸.（ ） （ ）（ ） （ ） （ ）（ ） （ ） （ ） （ ） （ ）?蜸 mphpp耀ai 5?m?a?ai ?p?,e 筨mhhpm1 ?pp?pi ?蜸?i ?pexe ?pep?.41253467891011125125346789101112?0010 ?0

3、? o ?010o? ?,?a6 ?eph6ae筨?i 筨a蜸 ?訸010 ?0? o ?010o? ?0? 010o ?010o?6?pe ?h?蜸 ?a?h?蜸筨ae ?a?m ?h?蜸 ?a?0010 ?0? o ?010o?120?訸010 ?0? o ?010o?030?m ?h?蜸 ?蜸?i021筨-1,6,a? ?,m? ?php?eme ?pep?, 5筨-pep? ?筨mhp0 x? ?筨-ppe?a蜸筨p蜸 ?i ,?蜸 ?ai ?m?x m?a6 筨ae ?蜸 筨a蜸 ?筨p蜸 ?i ,?蜸 ?ai ?m?x 2 筨ae ?蜸 筨a蜸 .7?m ?h?蜸 ?蜸?i?訸01

4、0 ?0? o ?010o?蜸?i ?蜸 m?p?蜸 m0筨e ?p筨?ai?m ?h?蜸 ?蜸?i?訸010 ?0? o ?010o?0010 ?0? o ?010o? ?訸? 訸010 ? o ?訸o31 ?0010? o 2 ?訸 ? 010o ?訸o 1 ?訸010? ? o 2 ?訸? 訸 ? 010o ?訸o?m? ?筨me m?p?蜸 m0筨e ?p筨?ai ?蜸 m?p?蜸 m0筨e ?p筨?ai1-?1m02-?1m0 000?000? ?0?0? o?蜸?i ?蜸 m?p?蜸 m0筨e ?p筨?ai?0010 ?0? o ?010o?8?pi ?pex蜸 5 ?蜸 ?筨?i

5、 ?筨?e ?0? a?蜸 筨ae ?h?蜸 ?蜸?i ?0? a?蜸 ?pe ?h?蜸 ?蜸?i?0? a?蜸 ?m ?h?蜸 ?蜸?i 9?蜸?i ?筨me m?p?蜸 ?,蜸1.筨m耀 ?p? ?phe筨me ?蜸?i2. ?me ?ph?a? ?蜸?i?a?ai ?蜸?a?ai ?蜸ae6? ?蜸 ?pi ?ep筨me ?me ?pi ?a?ai ?筨ph?蜸 ,筨ai?,i ?me?a?i ?ep筨me ?me ?m0mi?me ?phe筨me ?蜸?i?i ?ep筨me ,筨ai?,i ?me?i ?蜸 ,筨ai?,i ?me ?me ?phe筨me ?蜸?i a?蜸 筨p蜸 ?p

6、? p耀ai ?me ?ph?a? ?蜸?i筨m耀 ?p? ?phe筨me ?蜸?i?me ?ph?a? ?蜸?i?me ?phe筨me ?蜸?i?a?10?me ?ph?a? ?蜸?i ?pm蜸 筨ae ?h?蜸 ?i 5?蜸 ?pe ?h?蜸 ?蜸?i ?0p1?蜸 ?p0?0 5 m?m? ?pm蜸 ?m ?h?蜸 ?i ?蜸 ?0p1?蜸 ?p00 ?me ?phe筨me ?蜸?i ?6? 筨ae ?h?蜸 ?i ?蜸11?m? 1-?1m02-?1m0 000? ?筨me m?p?蜸 m0筨e ?p筨?ai 5?pep? ?p?,e ?p?筨 ?p筨?ai - ?p筨?ai ,a耀

7、?,?a6 ?i ?蜸?me ?ph?a? ?蜸?i?me ?ph?a? ?蜸?i?me ?phe筨me ?蜸?i?me ?phe筨me ?蜸?i?me ?ph?a? ?蜸?i?me ?phe筨me ?蜸?i? ?蜸 m?p?蜸 m0筨e ?p筨?ai 000?0r0o ?0? r訸?pexe ?pex蜸12?0010 ?0? o ?010o? ?訸? 訸010 ? o ?訸o31 ?0010? o 2 ?訸 ? 010o ?訸o 1 ?訸010? ? o 2 ?訸? 訸 ? 010o ?訸o?蜸?i ?筨me m?p?蜸 ?,蜸?me ?ph?a? ?蜸?i筨m耀 ?phe筨me ?蜸?i?

8、peeai ?me ?ph?a? ?蜸?i?me ?phe筨me ?蜸?i?pi ?ep筨me ,筨ai?,i ?me?pi ?蜸 ,筨ai?,i ?me ?i ?ep筨me ,筨ai?,i ?me?i ?蜸 ,筨ai?,i ?me ?m? ?筨me ?0r0o ?0? r訸 ?蜸 m?p?蜸 m0筨e ?p筨?ai1-?1m02-?1m0 000? 000? ?pexe ?pex蜸?蜸?i ?蜸 m?p?蜸 m0筨e ?p筨?ai?訸010 ?0? o ?010o?m ?h?蜸 ?蜸?i13?m? 000? 000? ?pexe ?pex蜸?ppe?ai ?p?蜸?i ?m6me 筨p蜸 ?

9、p0?p6 ?hp0筨, 5?p?蜸 ?p? ?p?i ?筨, ?aipp筨?e ?ee筨p? m?phm1 ?m?a?ai 5i?p? ?,? ?pe ?h?蜸 ?i ?蜸 ?a? ?m ?h?蜸 ?i ?蜸 ? ,a? 筨ae ?h?蜸 ?i ?蜸 ?pph?mpi ?pexe ?p?0aep? ?蜸 m?p?蜸 m0筨e ?p筨?ai1-?1m02-?1m0 ?筨me ?0r0o ?0? r訸14v ?i? ?0o 訸?r訸i ?00?a1?i 筨p蜸 ?xh,筨ae ?,e ?phe筨me ?hpm1 5 ?m6me 筨p蜸 m?a6 ?mhp蜸 ?p?x 5 ?p筨?ai - ?p筨

10、?ai ,a耀 ?pi 筨ae ?h?蜸 ?i ?蜸 , ?pi ?m ?h?蜸 ?i ?蜸 ?p?a耀 ?p?0-p6152-?0r ? ?i ?p?筨 (1) ? 5 p筨?ai-?p筨?ai ,a耀 (1) 筨ae ?h?蜸 5?蜸?i(2) ?m ?h?蜸 ?蜸?i 5 ( 2) ?pe ?h?蜸 ?蜸?i 筨a蜸.（1）（2） ?p?筨 (2) ? 5 p筨?ai-?p筨?ai ,a耀 (2) 筨ae ?h?蜸 ?蜸?i5(2) ?m ?h?蜸 ?蜸?i 5 ( 4) ?pe ?h?蜸 ?蜸?i 筨a蜸.16?p?,e ?,-筨-1,筨a6 ?0p筨?e（1）筨p蜸 m?, ?蜸?i p?pi ?pi m?, 筨ae ?蜸 5a?蜸 ?蜸 ?6? 筨ae ?h?蜸 ?i ?蜸. （ ） (3) ?p筨a蜸 ?me ?ph?a? ?p?蜸?i ?p00m耀 筨ae ?h?蜸 ?蜸?i ?p?蜸.(4)?me ?ph?a? ?p?蜸?i ?p00m耀 ?me ?phe筨me ?蜸?i ?p?蜸.（ ）(2) 筨p蜸 ,?蜸?i ?ai ?m?p ?pi 筨ae ?蜸 筨a蜸. （ ）（） (5) ?p筨a蜸 ?me ?phe筨me ?p?蜸?i ?p00m耀 ?me ?ph?a? ?蜸?i 5