All the angles we have learnt so far
Types of Angles and their Properties
Acute angle- Has an angle size of more them zero, but less than 90
Right Angle- Has an exact degree of 90, perpendicular to base
Obtuse angle- Has an angle size of more than 90 degrees, but less than 180
Straight angle- Has an exact size of 180 degrees.
Reflex angle- Has an angle size of more than 180 degree, but less than 360.
360 degree angle- Has an angle size of exactly 360, a full circle.
Important to know
-A ray is a line from an endpoint that goes on endlessly in one direction
-The base line of the angle is called the Initial
-The rising line is called the Terminal
-The point where they meet is called the Vertex
-Angles going anti-clickwise are positive
-Angles going clockwise are negative
-Complementary = 90 degrees
-Supplementary = 180 degrees
-Alternate angles, Adjacent angles, Corresponding, Vertically opposite and Co-interior angles
-The angles in a triangle add up to 180 degrees, the angles in a square add up to 360 degrees
Why are angles important?
They help us to learn about things we see every day!
Not that you see Pisa everyday, but you get the point.
They are useful in life.
If you were going to make a road.
So that your house doesn't fall down
Or anyone else's (if you were looking for a career in building...)