MATH 206 Quiz Review

```MATH 206 Quiz Review

An obtuse angle measures greater than 90 but less than 180

The appropriate tool to measure the degree within angles is called a protractor

Two lines that intersect to form right angles are called perpendicular

A regular polygon has all sides equal in length and all angles equal in measure

Two angles who sum is 90 are called commplentary angles

Two lines that do not lie in the same plane are called skew

A right-angle measure exactly 90

Two angles whose sum is 180 are called supplementary angles

An acute angle measure less than 90

Two lines that lie in the same plane and never intersect are called parallel

A ray extends from an endpoint indefinitely in one direction

Points that lie on the same plane are called colinear

Polygons are simple, closed curves with only segments as sides

A segment has two endpoints and contains part of a line

An angle is the union of two rays that share a common endpoint, called the vertex

According to Euclid, the three undefined terms are point, line, and plane

6 different types of triangles: right (one 90), acute (all<90), obtuse (one>90), equilateral
(all sides congruent), isosceles (at least 2 sides congruent), scalene (no sides congruent)

Polygons according to the number of sides: triangle, quadrilateral, pentagon, hexagon,
heptagon, octagon, nonagon, decagon, dodecagon

Degrees in a circle: 360

Degrees in a straight line: 180

Sum of interior angles of a triangle: 180 exterior:

Sum of interior angles of a square: 360 exterior:

Vertical angles are across from each other

Know how to read a protractor

Shapes!!!!!!!!!!!!

Equal: =

Not equal:

Congruent:

Parallel:

Similar:

Pi:

Approximately:

Perpendicular:
```
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