The document describes the process of measuring, cutting, and sanding dowels. It discusses measuring long sticks of wood to 7.7cm, realizing the dowels needed to be smaller at 7.5cm, and using a disk sander to more quickly sand the dowels to the proper size. Circumference and formulae were used to calculate that 16 dowels around the circle base with 2cm between each would fit the project requirements. The next steps are to check all the dowel sizes are the same and mark the base for drilling holes if so.

1. ~Cutting, Marking, Measuring, and Sanding dowels~ Monday 18/04/11<br />16002005080000-5715005080000-571500342900014859001651000-5715001651000-572135127635 Today I did measure, mark, cut, and sand the dowels. I needed 8 dowels more. So first, I got long stick wood, and measured 7.7cm each. I changed my plane. Before the dowels has to be 8cm, but I got small then 8cm dowels, so I changed to 7.7cm. After cut the dowels, I checked if the dowels are all same size. It was not same size still. So I have to sand it. I used flat file to sand dowels, but I thought it would take long time to sand whole dowels. So I asked Mr. Anderson to use disk sander for sand the dowels faster. He said ‘yes’. So I started to measure whole dowels to 7.5cm, and use pencil to marked. After marked whole dowels, I got goggle and hair band to use disk sander. Also after I got 20 dowels. I calculated how many dowels do I use. First, the bases are circle, so I calculated circumference of the base. <br />How to find circumference?<br />2πx x=radius of circle<br />My base of radius= 7.5cm<br />Formula: 2π7.5= approximate 47cm<br />So the circumference is 47cm. It not finish yet, then I calculated how many dowels can be put in the around the circle base. <br />The Formula is: circumference ÷ (2cm+1cm)<br />2cm is an opening between the dowel and the dowel. 1cm is dowel of width.<br />The answer is approximate 16 dowels. So my plane is the opening between dowel and dowel will be 2cm.<br />NEXT<br />I didn’t have time to check the dowels length size. So next class I have to check the dowels size, and if the sizes are all same, I want to mark in base to make hole for put these dowels. But if the sizes are not same, I will repeat measure, mark and sand dowels.<br />Emotion<br /> I thought math formula is REALLY useful!! Because today, I wanted to find how many cm do I have to open and mark for drill positions, and I used math formula to find that. <br />AOI-Human Ingenuity<br /> Today I used math formula to find circumference of base. Today I thought math is really important for DT. I did good invention to do this project. <br />