Test solutions with the detailed point scale. Add up your points and spot what to review.
2 Types of angles / 3 pts
15° acute (0.5 pt), 90° right (0.5 pt), 164° obtuse (0.5 pt), 91° obtuse (0.5 pt), 180° straight (0.5 pt), 89° acute (0.5 pt).
3 Using a protractor / 3 pts
(a) The angle measures 145° (1 pt). (b) It is obtuse (1 pt). (c) \(180 - 145 = 35\), so 35° (1 pt).
4 Adding angles / 4 pts
(a) \(90 - 56 = 34\), so 34° (1 pt).
(b) \(48 + 37 + 29 = 114\), so 114° (2 pts).
(c) \(180 - 114 = 66\), so 66° (1 pt).
5 Triangles and quadrilaterals / 4 pts
(a) Equilateral (1 pt). (b) Right triangle (1 pt). (c) A rhombus (1 pt). (d) True: a square has four right angles and opposite sides parallel (1 pt).
6 Symmetry / 3 pts
(a) 3 (1 pt). (b) 2 (1 pt). (c) 5 cm by 6 cm or 10 cm by 3 cm (1 pt).
Test yourself: quick challenge for Grade 4
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