Trial workbooks for grade 9 :  9.9 circles. 

 - Port Moresby :  Department of Education,  1982. 
 - 40 p. :  ill. ;  29 cm. 
 - Mathematics our way .
<br/><br/> Cover title. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Circle--Study and teaching--Papua New Guinea.<br/>Mathematics--Study and teaching--Papua New Guinea.