# math exam

## 35 terms

### Point

a location that has no size and is represented by a small dot; named by a capital letter

### Line

a series of points that extends in tow opposite directions without end; name by any tow points on it or with a single lowercase letter

### Parallel lines

coplanar lines that do not intersect

### Perpendicular lines

two lines that intersect to form right angles

### Skew lines

lines that are noncoplanar; therefore they are not parallel and do not intersect

### Segment

part of a line consisting of tow endpoints and all points between them

### Ray

part of a line consisting of one endpoint and all the points of the line on one side of the endpoint

### Plane

a flat surface that has no thickness, contains many lines and extends without end in the directions of all its lines, can name by either single capital letter or by at least three of its noncollinear points

d= √(x

### Midpoint

Endpoints of a segment in the coordinate plane

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### Equiangular triangle

all angles congruent

all angles acute

one right angle

one obtuse angle

### Equilateral triangle

all sides congruent

### Isosceles triangle

at least two sides congruent

### Scalene triangle

no sides congruent

3 sides

4 sides

5 sides

6 sides

8 sides

9 sides

10 sides

12 sides

### Convex polygon

has no diagonal with points outside the polygon

### Concave polygon

has at least one diagonal with points outside the polygon

### Congruent polygons

have congruent corresponding parts- their matching sides and angles;matching vertices are corresponding vertices; when named always list corresponding vertices in the same order

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### Midsegment of a triangle

segment connecting the midpoints of two sides

### Angle bisectors theorem

If a point is on the bisector of an angle, then the point is equidistant from the sides of the angle

### Perpendicular bisector

if a point is on the perpendicular bisector of a segment, then it is equidistant from the endpoints of the segment

### Median of a triangle

a segment whose endpoints are a vertex and the midpoint of the opposite side

### Altitude of a triangle

the perpendicular segment from a vertex to the line containing the opposite side; unlike angle bisectors and medians this can be a side of a triangle or it may lie outside the triangle