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GRADE 7 Grade 7 Mathematics Term 1:Space and Shape - Geometry of straight lines Geometry of Straight Lines Name: book © e-classroom 2013 www.e-classroom.co.za GRADE 7 Grade 7 Mathematics Term 1:Space and Shape - Geometry of straight lines Geometry of Straight Lines (2) © e-classroom 2013 www.e-classroom.co.za Name: Answer these questions in your class workbook. book. 1. Provide the definitions for each of these words and draw an example for each of them. a) line segment - a line that has a definite end (or point) and beginning b) ray - a line with a definite starting point but no clear or definite end c) straight line - a line with no definite beginning or end d) parallel lines - two lines that run next to each other that are equal distances from each other and will never touch e) 2. perpendicular lines - two lines that make a right angle with each other. For each of the segments below, say whether the segment is a line segment, ray, straight line, parallel lines or perpendicular lines. a) line segment b) straight line c) ray d) ray e) parallel lines f) straight line g) line segment h) perpendicular lines i) ray j) parallel lines © e-classroom 2013 www.e-classroom.co.za GRADE 7 Grade 7 Mathematics Term 1:Space and Shape - Geometry of straight lines Geometry of Straight Lines: Answer Sheet What is the symbol for a) 4. parallel lines? -∥ b) perpendicular lines -⊥ Draw the following as accurately as possible – remember to use your ruler: Note to teacher: answers may not be drawn to scale, but the end points are what is important in this exercise a) draw a ray that is 5cm long b) draw parallel lines that are 2cm apart 5cm c) draw a line segment 10cm long 2cm d) draw a straight line that is 40mm long 10cm e) draw a set of perpendicular lines 4cm f) draw a ray that is 35mm long 3.5cm © e-classroom 2013 www.e-classroom.co.za Grade 7 Mathematics Term 1:Space and Shape - Geometry of straight lines 3. GRADE 7 Geometry of Straight Lines: Answer Sheet (2) g) draw a straight line that 55mm long h) draw parallel lines that are 1cm apart. 5.5cm i) 1cm apart draw a line segment that is 47m long j) draw a set of perpendicular lines 4.7cm 5. Give 3 examples of where you would find these lines in real life: Note: As long as the examples are logical and make sense they can be allowed. The answers below are just some suggestions a) line segment - a ruler, the length of a desk; the height of someone; how far you walk to school; and so on – as long as there is a beginning and an end b) ray - a road; the start of a ball of string; toilet paper; any line that has a definite beginning but no definite end (or end in sight) © e-classroom 2013 www.e-classroom.co.za GRADE 7 Grade 7 Mathematics Term 1:Space and Shape - Geometry of straight lines Geometry of Straight Lines: Answer Sheet (3) straight line c) line c)c) straight straight line c) straight line -tiles tiles amall/ mall/ shopping centre; newspaper atthe the ---tiles inin shopping centre; newspaper atat inainaamall/ mall/ shopping centre; newspaper atthe the tiles shopping centre; newspaper printers; the middle aball ball ofwool/ wool/ string; any line that printers; the middle ofof ofof string; any line that printers; the middle ofaofaaball ball ofwool/ wool/ string; any line that printers; the middle string; any line that doesn’t have adefinite definite beginning orend. end. doesn’t have aaadefinite beginning oror doesn’t have definite beginning orend. end. doesn’t have beginning parallel lines d) lines d)d) parallel parallel lines d) parallel lines -the the edges ofthe the road; the edges adesk; desk; table legs; ---the edges ofof road; the edges ofof table legs; edges ofthe the road; the edges ofaofaadesk; desk; table legs; the edges road; the edges table legs; pencils next toeach each other; any two lines that not touch pencils next toto other; any two lines that do not touch pencils next toeach each other; any two lines that dodo not touch pencils next other; any two lines that do not touch and always equal distances from each other and always equal distances from each other and always equal distances from each other and always equal distances from each other perpendicular lines aT-junction; T-junction; the letter Tor orL; L;the the leg atable table e) lines ---aa-aT-junction; the letter TTTor leg ofof e)e) perpendicular perpendicular lines T-junction; the letter orL; L;the the leg ofaofaatable table e) perpendicular lines the letter leg joined atable; table; the corner aroom. room. Any two lines that joined toto the corner ofof Any two lines that joined toatoaatable; table; the corner ofaofaaroom. room. Any two lines that joined the corner Any two lines that are atright right angles toeach each other are atat angles toto other are atright right angles toeach each other are angles other © e-classroom 2013 www.e-classroom.co.za GRADE 7 Grade 7 Mathematics Term 1:Space and Shape - Geometry of straight lines Geometry of Straight Lines: Answer Sheet (4)