geometry

5. triangle with at least two sides congruent. 2. one line symmetry
10. – angle whose measure is 90 degrees. 2. as in a corner of a square or at the intersection of two perpendicular straight lines.
12. two angles whose sum is 90 degrees. 2. 20 + 70 = 90 degrees
13. number of cubic units contained in a solid 2. Length x width x hight
14. triangle with no sides congruent. 2.all three angles are of different measures.
15. angle whose measure is between 0 degrees and 90 degrees. 2. 45 degrees
16. segment whose endpoints are the center of the circle and a point on the circle. 2. half of the diameter

1. – set of points which has infinite length but no width or height. 2. A line is named by a lower case letteror by any two points on the line.
2. 1.has no size; length, width, or height. 2. It is represented by a dot and named by a capital letter.
3. the non-adjacent angles formed by two intersecting lines. 2. _______ angles are always congruent
4. angle whose measure is greater than 90 degrees. 2.less than 180 degrees.
6. sum of the area of all its faces. 2.PH+2B
7. the branch of mathematics concerned with the properties and relations of points, lines, surfaces, solids, and higher dimensional analogs. 2.the shape and relative arrangement of the parts of something.
8. two angles whose sum is 180 degrees. 2. 90 + 90 = 180 degrees
9. the figure formed by three segments joining three noncollinear points. 2. Each of the three pointsis a vertex of the triangle and the segments are the sides.
11. sum of the area of its lateral faces. 2. The lateral surface of an object is all of the sides of the object, excluding its base and top