Year 4 - Maths
Complete polygons with missing coordinates
Coordinates
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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 give directions from one position to another on a grid and move objects including polygons on a grid according to directions, and mark the new position. They will describe and draw polygons specified by translations.
Lesson Summary
You will learn to mark points specified as a translation from the origin.
Key Notes
- Use knowledge of polygon properties to identify a missing vertex.
- Use known coordinates to plot a missing coordinate.
Vocabulary To Learn
- Vertex / vertices: A vertex is the point where two or more line segments meet. The plural is vertices.
Common Mistakes To Avoid
- Pupils may not correctly identify the type of polygon (e.g., rectangle, square, parallelogram), leading to errors in determining the missing coordinate.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Use knowledge of polygon properties to identify a missing vertex. Use known coordinates to plot a missing coordinate.
2. Use this key word in a maths sentence and explain it clearly. 'Vertex / vertices'
A vertex is the point where two or more line segments meet. The plural is vertices. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Pupils may not correctly identify the type of polygon (e.g., rectangle, square, parallelogram), leading to errors in determining the missing coordinate. Correction: Encourage pupils to first identify the polygon by examining the given vertices. Review the properties of common polygons (e.g., opposite sides of a rectangle are equal and parallel). Use visual aids or models to reinforce these properties.
More Lessons In This Unit
- Describe translations of polygons drawn on a square grid Study Guide
- Draw polygons specified by coordinates in the first quadrant Study Guide
- Draw polygons specified by translations Study Guide
- Give directions from one position to another on a grid Study Guide
- Mark the position of points specified by coordinates in the first quadrant of a coordinate grid Study Guide
- Move objects including polygons on a grid according to directions and mark the new position Study Guide
- Solve problems involving marking and translating points in the first quadrant on a coordinate grid Study Guide
- Translate polygons in the first quadrant Study Guide
- Write coordinates for already marked points in the first quadrant of a coordinate grid Study Guide
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