Angles
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Transcript of Angles
H A L E Y M E A D O W S
4 T H H O U R W H I T E .
Discovering Angels
Complimentary Angels
two angles whose sum is a right angle.The picture to the top right is a Complimentary Angel Because it’s angles add up to 90°. Not all complimentaryAngels have to be together. The picture to the bottom Right is an example of a complimentary angel that is Not together, however their angels add up to 90°.
Linear pairs
The two supplementary adjacent angels formed by two intersecting lines.
The picture to the right is of a linear pair. The intersecting lines make it a linear pair.
Alternate Exterior Angles
When two lines are cut by another line (transversal), the pairs of angles formed outside the two lines and on the opposite of the transversal are called Alternate Exterior Angles
The picture to the left show an alternate exterior angel . <2, <8, <7,and <1 are allAlternate exterior angles. AB, CD, and EF are all examples of transversal angels.
Perpendicular Lines
two lines or planes (or a line and a plane), are considered perpendicular (or orthogonal) to each other if they form congruent adjacent angles (an L-shape). The term may be used as a noun or adjective.
the picture to the left is an example of perpendicular lines because they cross in the center. And they form congruendadjacent angles (an L-shape) in each side of the shape.
Supplementary Angles
Two Angles are Supplementary if they add up to 180 degrees.
The picture to the right shows a supplementary angle because the angles add up to 180°
Transversals
A transversal of two lines lying in the same plane is a line which intersects the in two different points.
The picture to the right is a transversal angel because it intersects at point G, E, and F.
Corresponding Angles
Corresponding angles are formed when a given transversal line crosses two parallel lines. The corresponding angles are not necessarily congruent, but they are if the coplanar lines are also parallel. ...
Lines B and C are the Parallel lines and line A is the line that crosses the two parallel lines.
A
B
C
Right Angles
A right angle is an internal angle which is equal to 90°
Because the angles add up to 90° it is a right angle.
Vertical Angles
vertical Angles are the angles opposite each other when two lines cross
The angles A and B are opposite of each other and the lines cross.
Alternate Interior Angles
When two lines are crossed by another line
Both lines are crossed by line f.
Parallel Lines
Lines are parallel if they are always the same distance apart and never touch.
These lines are always the same distance apart and will never touch.
Citation
http://www.mathsisfun.com/geometry/complementary-angles.html
http://www.allwords.com/word-linear+pair.html
http://www.icoachmath.com/SiteMap/AlternateExteriorAngles.html
http://www.proofwiki.org/wiki/Definition:Transversal_(Geometry)
http://www.google.com/search?hl=en&safe=active&client=safari&rls=en&defl=en&q=define:Corresponding+angles&sa=X&ei=ZYNZTaiWIYGBlAfpnfShBw&ved=0CBMQkAE
http://www.mathsisfun.com/rightangle.html
http://www.mathsisfun.com/geometry/vertical-angles.html
http://www.mathsisfun.com/geometry/alternate-interior-angles.html
http://www.mathsisfun.com/geometry/parallel-lines.html