# Is curved a rectangle

## Understanding Mathematics 1, workbook

11 Cuboid and cube 255 256 Square rectangle, triangle, circle 257 Sphere, cube, pyramid, cylinder, cuboid, cone 258 Globe Beverage can Punch donut Church tower roof Suitcase Fairy hat Cone pyramid Sphere Cuboid cylinder Cube Shoe box Game cube School bag basketball Advertising pillar Old Egyptian building 259 a) b) c) d) Cube, cuboid, pyramid, cone, sphere, cylinder 260 pyramid with square base 8 edges 5 corners 3 surfaces 1 curved 2 circles cuboid 2 edges 8 corners 6 surfaces squares sphere 12 edges no corners (1 point) 2 surfaces 1 curved 1 circle cube 1 edge 8 corners 1 curved surface cylinder 12 edges no corners 5 surfaces 1 square 4 triangles cones no edge no corners 6 surfaces rectangles 261 I only have flat surfaces: cubes, cuboids, pyramids. I have no more than 3 surfaces: sphere, cone, cylinder. I have a base and a top surface: cuboid, cube, cylinder. I have no curved edges: cube, cuboid, pyramid, sphere. I consist of only one surface: a sphere. I have a point: pyramid, cone. 262 Cuboid 1 5 3 Cube 4 - 2 Pyramid 4 1 2 Cones - - 1 Cylinder - - - Sphere - - 2 263 1) A cube has 8 corners, 12 edges, 6 faces. 2) The area EFGH is the top area of the cube. 3) Opposite this surface is the surface ABCD, this surface is called the base of the cube. 4) Each 4 edges are equally long and parallel. 5) All faces of a cube have the shape of a square. 6) The edges AB and CD are parallel, AD and AE are normal, EH and CG are normal and skewed. 264 ABDCEFHG 3) B 6) w, f, w, w 4) ABCD, DCGH 7) ABFE, BCGF 5) BCGF 8) 4 265 a) 5 c) 14 e) 8 b) 10 d) 11 f) 6 266 A and D, B and E, C and F 267 A, B, D Solutions: 11 Cuboid and cube 13 For test purposes only - property of the publisher Öbv

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