Angles L1 Functional Maths Angles October 2019. Kindly contributed by Andrew Butler, Newcastle. Search for Andrew on www.skillsworkshop.org Please refer to the download page for this resource on skillsworkshop for detailed curriculum links and related resources (including the related PDF worksheets). This PPT includes animations and should be run full screen. For further guidance, teachers should also refer to the notes area under some of the slides.
Reformed Functional Maths curriculum links include E3.20 Use appropriate positional vocabulary to describe position and direction including eight compass points and including full/half/quarter turns L1.24 Draw 2-D shapes and demonstrate an understanding of line symmetry & knowledge of the relative size of angles L1.26 Use angles when describing position and direction, and measure angles in degrees L2.22 Calculate values of angles and/or coordinates with 2-D and 3-D shapes Angles Session Aims To investigate angles and their uses
To accurately measure different classifications of angles Learning Outcomes By the end of this session you should be able to: Accurately measure 2 types of angles Name the different classifications of angles Give at least one example for using angles EXTENSION ACTIVITY Estimate angles within 360 Angles Where two lines meet (or intersect) at a point, then an angle is formed. The point of intersection of the lines is called the vertex.
B Lines AB and AC meet at the point A to form an angle. The point A is the vertex of the angle, and the lines that meet to make the angle are called the arms of the angle. A C Angles
Angles are used in daily life. Engineers and architects use angles for designs, roads, buildings and sporting facilities. Gardeners use angles to create pathways, flowerbeds and lawns Joiners use angles to make chairs, tables and doorframes. Artists use their knowledge of angles to sketch portraits and paintings. Hairdressers use angles to cut hair Angles Size of an Angle The amount of turn from one arm of the angle to the other is said to be the size of an angle.
B A C The size of an angle is measured in degrees; and the symbol used to represent degree is . There are 360 in a full turn (or circle). Angles Measuring Angles
A protractor is used to measure angles. A protractor has the shape of a semi-circle and two scales marked from 0 to 180. The two scales make it easy for us to measure angles facing different ways. Angles Purposely left blank see slide notes Angles
Purposely left blank see slide notes Angles Types of Angles Angles are classified according to their size. C 50 B A
An acute angle is greater than 0 and less than 90. A right angle equals exactly 90. C B A Angles R 130 P
Q An obtuse angle is greater than 90 and less than 180. B A 0 A straight angle equals exactly 180.
Angles 335 Q P R A reflex angle is greater than 180 and less than 360. A
A perigon (or a revolution) is an angle that equals exactly 360. Angles Key Terms point, angle, vertex, degrees, arms (of the angle), size (of an angle), protractor, inner scale, outer scale, acute angle, right angle, obtuse angle, straight angle, reflex angle, perigon, revolution Practice: https://www.primarygames.co.uk/pg2/bhunt/bhunt.html
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