Math 2 Unit 3 Vocab

3. a part of a circle.
4. if they have the same shape, congruent corresponding angles (meaning the angles in the same places of each shape are the same) and equal scale factors.
7. you do not use the pin button or the decimal approximation on your calculator and the symbol for pi is in your answer.
8. the result of a transformation of an original figure.
9. the sum of the measure of the angles of a triangle is 180.
10. through any given point not on a line there passes exactly one line parallel to that line in the same plane.
14. a transformation in which the original figure and its image are similar.
15. the ratio of any length on the image to the corresponding length on the original figure.
18. the halfway between the endpoint of a segment.
19. the ratio of the size of the drawing.
22. d = (x2-x1)^2+(y2-y1)^
23. if the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other.
24. when the image of dilation is larger than the original figure
27. the region of a circle formed by the center angle and its arc.
29. the distance from the center of a circle to the edge of a circle(half the distance of diameter).
30. two triangles whose vertices can be matched up so that the corresponding sides are in proportion.

1. if a line is drawn from a point on one side of a triangle parallel to another side, then it forms a triangle similar to the original triangle.
2. a solid with a polygon for a BASE and a single vertex not in the plane of the base
4. a three dimensional object (having length, width and height).
5. the distance around a circle.
6. If a,x, and b are positive numbers and a/x=x/b then x is called the geometric mean between a and b.
11. an equation in which two ratios are set equal to each other.
12. the amount of space a solid takes up.
13. in any right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the legs.
16. the image of dilation is smaller than the original figure.
17. the distance across a circle through the center.
20. a way to measure objects that are too large to measure using a tape measure or ruler.
21. in a triangle, the segment is drawn from a vertex perpendicular to the line containing the opposite side.
25. two triangles are similar whenever two angles of one triangle are congruent to two triangles of the other triangle.
26. a solid with two parallel BASES.
28. a segment of a polygon joining two non consecutive sides.