- Draw a circle on the board. Ask the pupils What is it? It’s a circle. Elicit the names of things that are round, eg the sun, a clock, a watch, a coin, a paper bin, a light. Teach the word circle and write it on the board.
Completing Geometry Worksheet
- Play Simon says. Ask the pupils to stand up and touch some objects in the classroom, eg (Simon says) touch a desk, the floor, the board, the wall, a book, a circle, a square. Stress circle and square.
- Ask a pupil to come to the front and touch the board. Show the pupils the four sides of the board. Write side on the board. Ask the pupils to touch the sides of their desks. How many sides has your desk got? Continue with other objects, eg book, door, notebook.
- Draw a line on the board and ask the pupils What’s this? It’s a line. Write lineon the board and say the word a few times. Use pictures and simple definitions to explain the words in Activity 1, eg a line (draw two points, then a line joining them); intersection – the point where two lines cross; parallel lines – two lines that never meet; a right angle – an angle that measures 90º; perpendicular lines – two lines that meet at a right angle; side (show them the four sides of the board or desk); vertex – the point where two lines meet at an angle (point to a corner of the board).
- Bring a pupil to the front of the class. Give instructions to practise the new language, eg Draw a line. Draw two parallel lines. Draw a circle. Touch the sides of the board. Point to a right angle. Draw two perpendicular lines. Invite some more pupils to come to the front and follow your instructions.
- Ask the pupils to do Activity 1.
Answers: 1-f; 2-c; 3-e; 4-a; 5-b; 6-d
- Draw a triangle on the board. Say triangle and encourage the pupils to repeat the word a few times. Ask the pupils How many sides has a triangle got? Three! How many angles? Three. Show the class the sides and the angles. Continue with rectangle, square, pentagon and hexagon. Encourage the pupils to use the structure A ______ has got ______ sides. A ______ has got ______ angles. Write this structure on the board.
- Look at the shapes in Activity 2 with the pupils and go through the names. Elicit sentences about the different shapes.
- Ask the pupils to write the names of the shapes and complete the sentences in Activity 2.
Answers: 1-rectangle; 2-pentagon; 3-square; 4-hexagon; 5-triangle b-four/four; c-square/ four/sides; d-pentagon/five; e-six/six
Invite some pupils to draw the shapes in Activity 2 on the board. Bring a pupil to the board and point to one of the shapes. Ask the pupil How many sides and angles has it got? Encourage the pupil to use the structure A ______ has got ______ sides and ______ angles. Teacher:Pentagon. Pupil: A pentagon has got five sides and five angles. The pupils can then continue in small groups.
- Show the pupils a ruler. Draw an equilateral triangle on the board (with three equal sides). Ask the pupils How many sides has it got? Three! Are the three sides the same length? Yes! Are the angles the same? Yes. Explain that this is an equilateral triangle. It is a regular triangle. Follow the same procedure for an isosceles triangle (with two sides the same length). Explain that this is an irregular triangle.
- Explain the difference between regular and irregular shapes. In regular shapes all the sides are the same length and all the angles are the same. In irregular shapes the sides are different lengths and the angles are different.Give some example using regular and irregular pentagons and hexagons.
- Divide the board into two halves. Write regular shapes on one side andirregular shapes on the other. Bring two pupils to the board, one on each side. Ask them to draw a triangle. Encourage the pupil on the regular shapesside of the board to draw an equilateral triangle with three sides the same length. Encourage the pupil on the irregular shapes side to draw a triangle with sides of different lengths. Compare the two triangles. Which one is more difficult to draw? Probably the regular one. Invite other pupils to draw different shapes.
- The pupils read the sentences and draw the shapes in Activity 3. It’s not important if the shapes don’t come out perfect as long as they have got the correct number of sides and look regular or irregular.
Ask the pupils to colour the shapes, eg Colour the regular hexagon blue.