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**Scheme of work: GCSE Foundation: Year 10: Term 2: Constructions and Scale Drawings **

- Identify and construct a radius, diameter, circumference, area, chord, tangent and arc.
- measure and begin to record lengths and heights
- identify acute and obtuse angles and compare and order angles up to two right angles by size

- Use the standard conventions for labelling and referring to the sides and angles of triangles; draw diagrams from the written description
- use the standard ruler and compass constructions (perpendicular bisector of a line segment, constructing a perpendicular to a given line from/at a given point, bisecting a given angle);
- use these to construct given figures and solve loci problems;
- know that the perpendicular distance from a point to a line is the shortest distance to the line

- Students need to sketch the diagram before attempting their construction. The sketch should be drawn freehand and contain all the necessary information.
- Bisectors are used to half an angle as well as a length of a line segment.
- Constructing a 60Â° angle using a pair of compasses is an essential skills throughout this topic as it goes on to equilateral triangles and reflex angles.

- Students often have difficulty constructing smooth arcs using a pair of compasses.
- Encourage students to try different techniques, such as rotating the paper rather than the compasses.
- It is important to leave in construction lines as these form the working out.

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