GEOMETRY Units 11. 12 and 13

Term Representation Name Dimensions POINT point A A LINE 1 r M N PLANE point A A LINE 1 r M N PLANE D E 2 plane DEF F Lines – any 2 points define a line. Planes – any 3 non-collinear points define a plane.

Kind of angles:

Sexagesimal System (60) We use Sexagesimal System to measure time (hour: h, minutes: min, seconds: s) angles (degree: º, minutes: ‘ , seconds: ‘’ ) 1 h = 60 min 1 º = 60 ‘ 1 min = 60 s 1 ‘ = 60 ‘’ x 3600 x 60 x 60 Hour (h) Degree (º) Minute (min) ( ‘ ) Second (s) ( ‘’ ) : 60 : 60 : 3600

Exercise 1. Express in minutes: a) 2h = 120 min d) 300 ‘’ = 5` b) 2h 3 min = 123 min e) 540 s = 9 min c) 3º 42’ = 180 + 42 = 222‘ c) 2 min 180 s = 2 + 3 = 5 min

1’ = 60 ‘’ 1º = 60 ’ ADDING AND SUBTRACTING ANGLES https://www.youtube.com/watch?v=hV7OWaKR1P0 1’ = 60 ‘’ 1º = 60 ’

Area and perimeter of plane shapes We call AREA to the size of a surface.

We call PERIMETER of a plane shape to the SUM of the length of its sides

Calssification of quadrilaterals

Area of a triangle