Lines
two lines that are the same distance apart and will never touch
parallel lines
This is the term for a 90 degree angle
right angle
A triangle that has all sides the same length and same angles, what type of triangle is this?
equilateral
This is the number of sides on a quadrilateral
4
A shape that has 6 sides is called
hexagon
lines that intersect to form a right angle and is shown by the symbol ||
perpendicular
An angle that is less than 90 degrees
acute
If a triangle has two sides that are the same, are the base angles equal? And what type of triangle is this?
Yes, isosceles.
this is the number of degrees all angles of a quadrilateral will add up to
360 degrees
A shape with 5 sides is called
pentagon
Supplementary angles add up to...
Complementary angles add up to..
180 and 90 degrees
an angle that is greater than 90 degrees
obtuse
If you want to show that two triangles are similar, what can you do in words to show this?
See if they are in proportion using ratios.
This is a quadrilateral with two pairs of opposite sides parallel and 4 right angles
rectangle
What is the formula for a n-sided polygon?
1800(n-2)
300 degrees is an example of what type of angle?
Reflex
this is the number of degrees in a straight angle
180 degrees
What are the four types of triangles?
Scalene, isosceles, equilateral, right angle
This is a quadrilateral with two pairs of opposite sides parallel and all sides the same length. (it does not have to have right angles)
rhombus
A quadrilateral has 3 angles measuring 90 degrees, 100 degrees, and 70 degrees. What is the measure of the 4th angle?
100 degrees
What are the 4 rules used when figuring out angles on parallel lines?
Corresponding, co-interior, alternate and vertically opposite.
The largest angle is opposite the ...... side?
longest
What are the four congruency tests for triangles?
SSS, RHS, AAS, SAS
This is a quadrilateral with only one pair of opposite sides parallel
trapezoid or trapezium
If a polygon has one interior angle greater than 180 degrees, is it convex or non convex?
non convex