An introduction to basic geometric terms for Sec 1 students
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Point | It represents a position. It has no size.
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| Line | It is made up of countless or infinite number of points. It can be straight or curved and is extensible in opposite directions.
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| Line segment | It is part of a straight line with a starting point and an ending point. It has length.
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| Ray | It starts from a point and extends outwardly in one direction
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| Intersecting | Meeting or cutting across.
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| Plane | Is a flat surface without any thickness.
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| Collinear | Is used to describe three or more points which lie on the same straight line.
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| Acute angle | An angle which is less than 90°
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| Right angle | An angle which is 90°
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| Obtuse angle | An angle which is more than 90° but less than 180°.
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| Straight angle | An angle which is 180°
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| Reflex angle | An angle which is more than 180° but less than 360°.
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| Perpendicular | Is used to describe two lines which intersect at 90°.
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| Supplementary angles | Are two angles which add up to 180°.
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| Adjacent angles | Are two angles which have a common side and a common vertex.
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| Vertex | Is a pointed corner.
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| Parallel lines | Are lines that do not meet.
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| Transversal | Is a line which cuts two or more lines on the same plane.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
edugan_hoh
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