Geometry.

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Presentation transcript:

Geometry

We are learning to: Describe features of 2 and 3D shapes. Measure and make nets for containers. Identify angles, perpendicular, parallel and vertical lines. Draw and interpret scale maps. Give clear directions to follow paths between positions in maps and mazes. Describe and follow directions using compass points. Enlarge a shape to scale.

Name the shape

Can you name this person or object? Line A B A B AB Dan the man Marshall

Horizontal, vertical and diagonal

Two lines are needed to form an angle. Angles: What is an angle? What unit is used to measure the amount of turn? ¼ turn is … ½ turn is … ¾ turn is … Full turn or a circle is… An angle is the amount of turn Degrees (°) 90° 180° 270° 360° Two lines are needed to form an angle.

Right Angles A right angle is a turn of 90° (90 degrees) How do we show a right angle?

Activity 1 Make a setsquare by following the instructions on p. 189 in your textbook. Work with a friend and predict what angles are right angles. Use the setsquare to test your predictions. Find examples of perpendicular lines. Draw at least two examples of perpendicular lines. [Remember the date and heading]

PARALLEL LINES What are parallel lines? How do we show lines are parallel? How do we write it when lines are parallel? Lines that are always the same distance apart. AB║CD

PERPENDICULAR LINES What are they? How do we show lines are perpendicular? How do we write it when lines are perpendicular? Two lines meeting or crossing at a 90° angle (right angle) AB ┴ CD C A B D

TASK Use the digital camera and take a photo of: Parallel lines Perpendicular lines Right angles Lines – horizontal, vertical and diagonal