# Geometry Semester 1 Final

### 39 terms by nataliefittsy

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at least 2

### a plane contains ( ) points ( )

at least 3; not all in one line

exactly 1

at least 1

exactly 1

in that plane

### if 2 lines intersect, they intersect ( )

in exactly 1 point

exactly 1

exactly 1

### median of a triangle

segment from a vertex to the midpoint of the opposite side

### altitude of a triangle

perpendicular segment from a vertex to the line that contains the opposite side

### perpendicular bisector

line, ray, or segment that is perpendicular to the segment at its midpoint

### if a point lies on the perpendicular bisector of a segment, then the point is ( )

equidistant from the endpoints of the segment

### if a point is equidistant from the endpoints of a segment, then the point ( )

lies in the perpendicular bisector of the segment

### if a point lies on the bisector of an angle, then the point is ( )

equidistant from the sides of the angle

### if a point is equidistant from the sides of an angle, then the point ( )

lies on the bisector of the angle

### if 2 lines are parallel, then ( )

all points on one line are equidistant from the other line

### if 3 parallel lines cut off congruent segments on one transversal, then they ( )

cut off congruent segments on every transversal

### a line that contains the midpoint of one side of a triangle and is parallel to another side ( )

passes through the midpoint of the 3rd side

### the segment that joins the midpoints of 2 sides of a triangle ( ) and ( )

is parallel to the 3rd side; is 1/2 as long as the 3rd side

### definition of a rectangle

parallelogram with 4 right angles

### definition of a rhombus

parallelogram with 4 congruent sides

### definition of a square

parallelogram with 4 right angles and 4 congruent sides

rectangle

congruent

rhombus

perpendicular

rhombus

### each diagonal of a rhombus ( )

bisects 2 angles of the rhombus

### the midpoint of the hypotenuse of a right triangle is ( )

equidistant from the 3 vertices

### if an angle of a parallelogram is a right angle, then ( )

the parallelogram is a rectangle

### if 2 consecutive sides of a parallelogram are congruent, then ( )

the parallelogram is a rhombus

### definition of a trapezoid

quad with exactly one pair of parallel sides

### bases

parallel sides of a trapezoid

### legs

nonparallel sides of a trapezoid

### definition of an isosceles trapezoid

trapezoid with congruent legs

### BAT TRAP

base angles of an isosceles trapezoid are congruent

### median of a trapezoid

segment that joins the midpoints of the legs

### the median of a trapezoid ( ) and ( )

is parallel to the bases; has a length equal to the average of the base lengths

Example: