Sixth Grade Students’ Some Difficulties and Misconceptions on Angle Concept
1987 ◽
Vol 18
(3)
◽
pp. 250-266
◽
2007 ◽
Vol 31
(2)
◽
pp. 198-226
◽
1970 ◽
Vol 18
(3)
◽
pp. 265-272
◽
1989 ◽
Vol 65
(3)
◽
pp. 1017-1018
◽
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