Level 3 · Mathematics M3.5
Angles, triangles and symmetry
Work out missing angles, draw accurate triangles, and find symmetry in shapes.
Find missing angles on a line, round a point and between parallel lines. Show that a triangle has 180° and a quadrilateral 360°, and find the angles of any polygon. Draw triangles with ruler and compasses, cut an angle in half, find line symmetry and turning symmetry, and draw solids, nets and views.
8 chapters. Your place is kept on this device only.
You are ready for this book if
You can measure an angle with a protractor to the nearest degree.
- One step up M4.3 Pythagoras and trigonometry
- This book M3.5 Angles, triangles and symmetry
- One step down M2.5 Shapes and angles
Contents
- 1Angles on a line and round a point, readunderstood
- 2Angles and parallel lines, readunderstood
- 3Triangles, readunderstood
- 4Angles in polygons, readunderstood
- 5Drawing with ruler and compasses, readunderstood
- 6Line symmetry and reflection, readunderstood
- 7Turning symmetry, readunderstood
- 8Solids, nets and views, readunderstood
Keep it, print it, pass it on
- One file for any phone
801 KB. Opens with no internet. Share it with anyone. - PDF to print
1.2 MB, 100 A4 pages. Answers at the back. Copies well in black and white. - EPUB for reading apps
126 KB. For e-readers and book apps.
For parents and teachers
For learners who can measure an angle with a protractor and know that a right angle is 90°. In many schools this fits children of about 11 to 13, and older learners who never met angle rules can start here too. Each chapter takes one or two short sessions. A learner needs a ruler, a protractor, a pencil and, for one chapter, a pair of compasses with a sharp point, so an adult should be near. Every exercise has its answer and the reason for it. Each chapter also has a short page for the adult, with three questions to ask.
Strand: Shape and space. Written and drawn by attnom. Free to read, print and share.