Net and Surface Area www mathsrevision com S

Net and Surface Area www. mathsrevision. com S 4 Surface Area Net of Solids 29 -Oct-21 Compiled by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com S 4 29 -Oct-21 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. 29 -Oct-21 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.

Revision of Area S 4 www. mathsrevision. com The Square l l Friday, October 29, 2021 The RAT The Rectangle b h l Created by Mr. Lafferty b 4

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) 29 -Oct-21 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 29 -Oct-21 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 29 -Oct-21 8 vertices 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 29 -Oct-21 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.

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 29 -Oct-21 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.

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 29 -Oct-21 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 1 Ch 7 (page 80) 29 -Oct-21 Compiled by Mr. Lafferty Maths Dept.

Starter Questions www. mathsrevision. com S 4 29 -Oct-21 Compiled by Mr. Lafferty Maths Dept.

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. 29 -Oct-21 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 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 29 -Oct-21 This is a NET for the cube 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 29 -Oct-21 Compiled by Mr. Lafferty Maths Dept. Total 6 x 25 = 2 150 cm

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 29 -Oct-21 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 29 -Oct-21 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 2 Ch 7 (page 85) 29 -Oct-21 Compiled by Mr. Lafferty Maths Dept.