Year 6 - Maths
Solve problems involving missing coordinates
Area, perimeter, position and direction
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit pupils will explain how to calculate the area of a parallelogram and a triangle. They will describe the relationship between scale factors and side lengths. They will describe positions in all 4 quadrants.
Lesson Summary
You will learn to solve problems involving missing coordinates.
Key Notes
- Coordinate grids are not always presented with grid lines, and the axes are not always fully-labelled.
- When this is the case, it is essential to consider the known coordinates to work out missing coordinates.
- Missing coordinates sometimes appear on the same horizontal or vertical line as known coordinates, so they are the same.
- Sometimes we need to use known vertices to calculate unknown side lengths when working out missing coordinates.
Vocabulary To Learn
- Congruent: If two shapes are the same shape and size as each other, they are congruent.
- Vertex / vertices: A vertex is where two or more line segments meet. The plural is vertices.
Common Mistakes To Avoid
- Pupils need to have proficiency in bridging across zero with negative numbers, in the range of −10 to 10. Grid lines that might help to support such calculations are not given in this lesson.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Coordinate grids are not always presented with grid lines, and the axes are not always fully-labelled. When this is the case, it is essential to consider the known coordinates to work out missing coordinates.
2. Use this key word in a maths sentence and explain it clearly. 'Congruent'
If two shapes are the same shape and size as each other, they are congruent. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Pupils need to have proficiency in bridging across zero with negative numbers, in the range of −10 to 10. Grid lines that might help to support such calculations are not given in this lesson. Correction: Pupils not secure will need a resource within the lesson to support their calculations, such as a number line going from −10 to 10.
More Lessons In This Unit
- Describe the relationship between scale factors and perimeters of two shapes Study Guide
- Draw and complete simple shapes by plotting positions on the full coordinate grid Study Guide
- Draw and translate simple shapes on the full coordinate grid Study Guide
- Explain how to calculate the area of a parallelogram Study Guide
- Explain how to calculate the area of a triangle Study Guide
- Reflect simple shapes in the axes on a full coordinate grid Study Guide
- Solve problems involving area and perimeter Study Guide
- Use the area of a parallelogram formula to calculate unknown measurements Study Guide
- Use the area of a triangle to calculate unknown measurements Study Guide
Browse all guides in the Year 6 Maths guide library.