### Math Vocabulary Chapter 8

Name _________________________

 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

Across
1.An angle that measures less than 90
5.A transformation of a figure that flips the figure across a line
7.The imaginary "mirror" in line symmetry
10.A straight path that extends without end in opposite directions
11.A quadrilateral with exactly one pair of parallel sides
12.A triangle with all angles measuring less than 90
16.Lines that lie in different planes that are neither parallel nor intersecting
17.On an angle or polygon, the point where two sides intersect
19.Two angles whose measures add to 90
21.A triangle with at least two congruent sides
22.A rectangle with four congruent sides
23.A parallelogram with four right angles
26.A polygon with congruent sides and angles
29.A transformation in which a figure is turned around a point
31.Lines that intersect to form right angles
32.A four-sided polygon
33.A triangle containing one obtuse angle
34.A movement (slide) of a figure along a straight line
35.A figure has this if one half is a mirror-image of the other half
36.And angle that measures 90
38.Lines in a plane that do not intersect
39.A part of a line between two endpoints
40.A change in the size or position of a figure
Down
2.Angles in the same plane that have a common vertex and a common side
3.A line that a figure is flipped across to create a mirror image of the original figure
4.A parallelogram with all sides congruent
6.An exact location in space
8.Two angles whose measures have a sum of 180
9.A quadrilateral with two pairs of parallel sides
13.A triangle with three congruent sides
14.An angle whose measure is greater than 90 but less than 180
15.A triangle with no congruent sides
18.An angle that measures 180
20.A flat surface that extends forever
24.A pair of opposite congruent angles formed by intersecting lines
25.A triangle containing a right angle
27.Having the same size and shape
28.A closed plane figure formed by three or more line segments that intersect only at their endpoints
30.A part of a line that starts at one endpoint and extends forever
37.A figure formed by two rays with a common endpoint called the vertex

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