Lines, Rays,Segments
a line segment has how many endpoints?
2
a right angle's measure is...
the sum of a triangle's interior angles is...
180 degrees
a 4- sided figure is called a...
quadrilateral
perimeter is the sum of...
all side lengths
for points to be collinear, they must be on the same...
line
an obtuse angle has a measure less than 90. True or False.
False
a triangle with all equal sides is...
equilateral
a regular polygon has...
equal sides and equal angles
to calculate area you ALWAYS multiply base * height
NO, False
Not always!
how is a ray different from a line?
ray has one endpoint and extends forever, line extends forever in both directions
complementary angles add up to...
90 degrees
the formula you can use to solve for side lengths of a right triangle is...
the pythagorean theorem
a^2 + b^2 = c^2
the sum of the interior angles of a quadrilateral is...
360 degrees
the area of a triangle formula is...
1/2*b*h
a line is labeled with...
<--->
angles that share a point and side are called...
corresponding
a triangle with 2 equal sides is...
isosceles
a quadrilateral with only ONE pair of parallel sides is...
a trapezoid
area of a circle formula is....
πr^2
a line has how many endpoints...
zero
angles that add up to 180 are....
complementary / straight
similar triangles can be proven with which postulates...
SAS, SSS, AAA
a concave polygon....
has a side that goes inward
if i draw a line inside the polygon, it will go outside the edges
area is measured in...
square units or units^2