Vocab
Any shape with 4 sides and 4 right angles
rectangle
A polygon whose sides and angles are all equal
regular polygon
A 5-sided polygon
Pentagon
Explain the difference between a prism and a pyramid
A pyramid has base, and all sides from that base lead to one point. A prism has 2 identical bases and all flat sides.
A closed shape with no intersecting lines
polygon
Name the 3 types of triangles ('right triangle' doesn't count) and define them
Equilateral
Isosceles
Scalene
Two lines that intersect to form a T (90 degree angle) can be described as
An angle less than 90 degrees
Acute angle
Explain Euler's Formula and what it represents
F + V = E + 2
Two lines that never intersect can be described as
Parallel
A 4-sided figure with 2 sets of parallel sides
Parallelogram
An angle greater than 90 degrees
Obtuse angle
A 12-sided polygon
Dodecagon
A 9-sided polygon
Nonagon
A 4-sided figure with exactly 1 set of parallel sides
Trapezoid
The 'point' or 'corner' of a shape is called its
Vertex
An 11-sided polygon
Hendecagon
Sides that share a common vertex are _____ sides
Adjacent
Supplementary Angles
Two angles that add to 90 degrees
Complementary Angles