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Geometry Test Review
Question | Answer |
---|---|
two angles whose sum= 180° | supplementary angles |
two angles whose sum= 90° | complementary angles |
2 angles formed by intersection, opposite and - to each other | vertical |
2 angles that share a vertex and a side | adjacent |
one angle that is less than 90° | acute |
one angle that is more than 90° | obtuse |
one angle that is 90° | right |
lines intersecting to form 90° | perpendicular lines |
4 sides, for angles = 360° | quadrilaterals |
opposite sides parallel and equal | parallelogram |
all 4 sides equal and opposite sides parallel | rhombus |
on set of parallel sides (bases) others not | trapezoid |
opposite sides parallel and equal, 90° angles | rectangle |
all 4 sides equal, opposite sides parallel, 90° angles | square |
5 sided | pentagon |
6 sided | hexagon |
7 sided | heptagon |
8 sided | octagon |
9 sided | nonagon |
10 sided | decagon |
more than 10 sides | n sides ---> n-gon |