Across
- 1. Half of a circle where the endpoints of the arc are the diameter. This measure 180 degrees.
- 5. Has congruent corresponding parts which means there are matching angles and sides. When you name these, the corresponding verticals have to be in the same order.
- 7. When the hypotenuse and the leg are congruent to the hypotenuse and leg of a second triangle. The triangle has to be right triangle for this to work.
- 9. The amount of space inside a circle. The formula to find this is (pi)(r^2).
- 12. Law used when given 2 sides and it's included angle (SAS) or the lengths of all the sides of the triangle (SSS).The formula is c^2=a^2+b^2-2(a)(b)(cosc).
- 15. 2 angles with a common vertex and can't overlap. There are no common interior points.
- 17. The sum of the areas of all the faces that enclose a solid. The faces include the bases and the remaining surfaces.
- 19. Law used to solve missing sides or angles for a triangle. Things to make sure you know when using this is side a faces angle A, side b faces angle B, and side c faces angle C.
- 20. Only occurs for a right triangle where the two legs equal the hypotenuse. The formula is a^2+b^2=c^2.
- 21. These can be clockwise or counterclockwise. The 90 degree turn for the preimage is (x,y) and the image becomes (-y,x) after the turn.
Down
- 2. If two lines and a transversal form corresponding angles that are congruent, then the lines are parallel. This is a way to prove lines are parallel.
- 3. The sum of the area of lateral faces. This does not include bases.
- 4. Shows two triangles are congruent if both have 2 sides and an included angle that are congruent. The included angle is between the 2 sides.
- 6. A polygon that has 5 sides and 5 angles that are congruent. The sum of the interior angles is 540 degrees.
- 8. A region bounded by the arc of a circle and the radius to the endpoints of the arc. The smaller area of this is called the minor sector and the larger part is called the major sector.
- 9. An angle that is formed between the horizontal angle and your line of sight. When you are looking upward at objects.
- 10. The distance around a circle. The formula is c=(2)(pi)(r) or c=(pi)(d).
- 11. All sides are congruent and all angles are congruent. The formula for the measure of this is 180(n-2)/n.
- 13. A straight line that only touches one point of the circle. The point is the point of tangency.
- 14. 2 angles that measure 180 degrees. To find one of the angles you subtract the given angle from 180.
- 16. An angle that is formed between the horizontal angle and your line of sight. When you are looking downward at objects.
- 18. When the image is the same size as the preimage. This is also known as rigid motion.