How To Use a Protractor

Last week my partners and I finished off our DLO of how to use a protractor. A protractor is a tool that helps you find the angle of a shape or of a line. Recently we used protractors in our maths because we were learning about acute, obtuse and reflex angles. An acute is an angle between 0° - 90°, an obtuse is 90° - 180° and a reflex is between 180° - 360°. One thing I learnt by using a protractor is that the base line is 180°.

Angles - Multiple Rays

Today Sanujan, Tiava and I partnered up to complete a worksheet that was based on finding angles. To help us we used something called a protractor. First of all we found it pretty challenging because we were doubting our selves and we were using different techniques that did not work. After a while Miss Morris told us how to use it properly. After that we were either right or an angle out. We found this very interesting and a bit challenging.

Finding Angles

 

This week Ms Kirkpatrick has been teaching us about interior angles and how to find them. Today we have been looking at the interior angles of a triangle and angles on a straight line. Today I decided to show you how I got my answer to one of the angles on a straight line question. Firstly I did 57 + 52 which equals 109. Next I did 109 +  = 180. After that I filled in the blank space which is also the missing angle on the question. The answer was 71. Lastly I did, 109 + 71 = 180