Net and Surface Area www mathsrevision com S

Net and Surface Area www. mathsrevision. com S 4 Faces Edges and Vertices The Cube The Cuboid The Triangular Prism 27 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com S 4 27 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Faces Edges and Vertices www. mathsrevision. com S 4 Learning Intention 1. To understand the meaning of Face Edge and Vertex in relation to a various shapes an be able to identify them. 27 -Nov-20 Success Criteria 1. To know 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 S 4 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) 27 -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 S 4 6 faces Front and back are the same Top and bottom are the same Right and left are the same 27 -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 S 4 6 faces 12 edges Faces are squares 27 -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 S 4 Cylinder 5 faces 9 edges 6 Vertices Triangular Prism 3 faces 2 edges 0 Vertices 27 -Nov-20 Compiled by Mr. Lafferty Maths Dept. 2 faces 1 edges 1 Vertices Cone Sphere 1 faces 0 edges 0 Vertices

Net and Surface Area The Cube www. mathsrevision. com S 4 Now Try Ex 2. 1 Ch 11 Q 9 (page 168) 27 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com S 4 27 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Net and Surface Area The Cube www. mathsrevision. com S 4 Learning Intention 1. To understand the term net for the cube and work out its surface area. Success Criteria 1. To know what net means. 2. Decide if a diagram makes a net for a cube. 3. Work out the surface area of a cube using previous knowledge of area. 27 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Net and Surface Area The Cube www. mathsrevision. com S 4 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 27 -Nov-20 This is a NET for the cube Compiled by Mr. Lafferty Maths Dept.

Net and Surface Area The Cube www. mathsrevision. com S 4 Now try Ex 4. 1 Ch 11 (page 170) 27 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Net and Surface Area The Cube S 4 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 27 -Nov-20 Compiled by Mr. Lafferty Maths Dept. Total 6 x 25 = 2 150 cm

Starter Questions S 4 www. mathsrevision. com 9 cm 2 cm 6 cm 27 -Nov-20 Compiled by Mr. Lafferty Maths Dept. 7 cm

Net and Surface Area The Cuboid www. mathsrevision. com S 4 Learning Intention 1. To draw the net of a cuboid and work out its surface area. 27 -Nov-20 Success Criteria 1. Draw a net of a cuboid. 2. Work out the surface area of a cuboid using previous knowledge of the area of a rectangle. Compiled by Mr. Lafferty Maths Dept.

Net and Surface Area The Cuboid www. mathsrevision. com S 4 4 cm LS 3 cm 5 cm 6 faces Top and bottom congruent Front and back congruent Left and right congruent 27 -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 www. mathsrevision. com S 4 Find the surface area of the cuboid Working Front Area = l x b 2 = 5 x 4 =20 cm 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 27 -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 S 4 Now try Ex 5. 1 Ch 11 (page 172) 27 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com S 4 6 cm 8 cm 27 -Nov-20 Compiled by Mr. Lafferty Maths Dept.

Net and Surface Area Triangular Prism www. mathsrevision. com S 4 Learning Intention 1. To draw the net of a triangular prism. 27 -Nov-20 Success Criteria 1. Draw a net of a triangular prism. 2. Work out the surface area of a right angled triangular prism using the area formulae for a rectangle and triangle. Compiled by Mr. Lafferty Maths Dept.

Net and Surface Area Triangular Prism www. mathsrevision. com S 4 Bottom 4 cm 10 cm BT 4 cm Front 5 faces 3 congruent rectangles 2 congruent triangles 27 -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 S 4 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 27 -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.

www. mathsrevision. com Net and Surface Area Triangular Prism Now try Ex 5. 2 Ch 11 (page 173) 27 -Nov-20 Compiled by Mr. Lafferty Maths Dept.