Net and Surface Area www mathsrevision com Level

Net and Surface Area www. mathsrevision. com Level 2 Faces Edges and Vertices The Cube The Cuboid The Triangular Prism 24 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com Level 2 24 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Faces Edges and Vertices www. mathsrevision. com Level 2 Learning Intention 1. We are learning the meaning of Face, Edge and Vertex. 24 -Nov-20 Success Criteria 1. Understand the terms Face Edge and Vertex. 2. Calculate the number of Faces Edges and Vertices for various shapes. Compiled by Mr. Lafferty Maths Dept.

Don’t forget the faces edges and corners we can’t see at the back Face Edges and Vertices Level 2 www. mathsrevision. com The shape below is called a cuboid. It is made up of FACES, EDGES and VERTICES. Edges are where the two faces meet (lines) Faces are the sides of a shape (surface area) 24 -Nov-20 Vertices where lines meet (corners) Compiled by Mr. Lafferty Maths Dept.

Calculate the number of faces edges and vertices for a cuboid. Face Edges and Vertices www. mathsrevision. com Level 2 6 faces Front and back are the same Top and bottom are the same Right and left are the same 24 -Nov-20 Compiled by Mr. Lafferty Maths Dept. 12 edges 8 vertices

Calculate the number of faces edges and vertices for a cube. Face Edges and Vertices www. mathsrevision. com Level 2 6 faces 12 edges Faces are squares 24 -Nov-20 8 vertices Compiled by Mr. Lafferty Maths Dept.

Name and then calculate the number of faces, edges and vertices for these shapes Face Edges and Vertices www. mathsrevision. com Level 2 Cone 2 faces 1 edge 1 vertex Cylinder 3 faces 2 edges 0 vertices 24 -Nov-20 Triangular Prism 5 faces 9 edges 6 vertices Compiled by Mr. Lafferty Maths Dept. Sphere 1 face 0 edges 0 vertices

Starter Questions www. mathsrevision. com Level 2 24 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Net and Surface Area The Cube www. mathsrevision. com Level 2 Learning Intention 1. We are learning the term net. Success Criteria 1. Understand the term net. 2. Decide if a diagram makes a net for a cube. 3. Calculate the surface area of a cube using previous knowledge of area. 24 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Net and Surface Area The Cube www. mathsrevision. com Level 2 The net of a solid shape is the shape you would get if it was made of cardboard and you “opened it up and laid it out flat”. Right left Bottom Top Back Front Side 6 faces All congruent All squares 24 -Nov-20 This is a NET for the cube Compiled by Mr. Lafferty Maths Dept.

Net and Surface Area The Cube www. mathsrevision. com Level 2 Now try Exercise 1 Ch 20 (page 234) 24 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Net and Surface Area The Cube Level 2 www. mathsrevision. com Question : Find the surface area of the cube below. What do we know? • Made up of 6 faces • All the same (congruent) • All squares 5 cm 24 -Nov-20 Compiled by Mr. Lafferty Maths Dept. Total 6 x 25 = 2 150 cm

Net and Surface Area The Cube www. mathsrevision. com Level 2 Now try Exercise 2 Ch 20 (page 235) 24 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Starter Questions Level 2 www. mathsrevision. com 9 cm 2 cm 6 cm 24 -Nov-20 Compiled by Mr. Lafferty Maths Dept. 7 cm

Net and Surface Area The Cuboid www. mathsrevision. com Level 2 Learning Intention 1. We are learning to draw the net of a cuboid and calcualte its surface area. Success Criteria 1. Be able to draw a net of a cuboid. 2. Calculate the surface area of a cuboid using previous knowledge of the area of a rectangle. 24 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Net and Surface Area The Cuboid www. mathsrevision. com Level 2 4 cm LS 3 cm 5 cm 6 faces Top and bottom congruent Front and back congruent Left and right congruent 24 -Nov-20 Bottom 3 cm Back RS Top 3 cm Front 4 cm 5 cm This is a NET for the cuboid Compiled by Mr. Lafferty Maths Dept.

Example Level 2 Find the surface area of the cuboid Working Front Area = l x b 2 = 5 x 4 =20 cm www. mathsrevision. com DEMO 4 cm 3 cm Side Area = l x b 2 = 3 x 4 =12 cm Total Area 5 cm Front and back are the same Top and bottom are the same Right and left are the same 24 -Nov-20 Top Area = l x b 2 = 5 x 3 =15 cm = 20+20+15+15+12+12 2 = 94 cm Compiled by Mr. Lafferty Maths Dept.

Net and Surface Area The Cuboid www. mathsrevision. com Level 2 Now try Exercise 3 Ch 20 (page 236) 24 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com Level 2 6 cm 8 cm 24 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Net and Surface Area Triangular Prism www. mathsrevision. com Level 2 Learning Intention 1. We are learning to draw the net of a triangular prism. Success Criteria 1. Be able to draw a net of a triangular prism. 2. Calculate the surface area of a right-angled triangular prism using the area formulae for a rectangle and triangle. 24 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Net and Surface Area Triangular Prism www. mathsrevision. com Level 2 Bottom 4 cm 10 cm BT 4 cm Front 5 faces 3 congruent rectangles 2 congruent triangles 24 -Nov-20 Back 4 cm FT 4 cm 10 cm This is a NET for the triangular prism. Compiled by Mr. Lafferty Maths Dept.

Example www. mathsrevision. com Level 2 Find the surface area of the right angle prism 5 cm 3 cm 10 cm 4 cm 2 triangles the same 1 rectangle 3 cm by 10 cm 1 rectangle 4 cm by 10 cm 1 rectangle 5 cm by 10 cm 24 -Nov-20 Working Triangle Area = 2 x 3 =6 cm Rectangle 1 Area = l x b 2 = 3 x 10 =30 cm Rectangle 2 Area = l x b 2 = 4 x 10 =40 cm Rectangle 3 Area = l x b 2 = 5 x 10 =50 cm Total Area 2 = 6+6+30+40+50 = 132 cm Compiled by Mr. Lafferty Maths Dept.

Net and Surface Area Triangular Prism www. mathsrevision. com Level 2 Now try Exercise 4 Ch 20 (page 239) 24 -Nov-20 Compiled by Mr. Lafferty Maths Dept.