Across
- 7. arranged in or extending along a straight or nearly straight line
- 8. when they add up to 180 degrees. These two angles (140° and 40°) are Supplementary Angles, because they add up to 180°: Notice that together they make a straight angle. But the angles don't have to be together
- 9. each of the lines in which light (and heat) may seem to stream from the sun or any luminous body, or pass through a small opening
- 10. next to or adjoining something else
- 13. Exactly equal in size and shape. Congruent sides or segments have the exact same length. Congruent angles have the exact same measure. For any set of congruent geometric figures, corresponding sides, angles, faces, etc. are congruent
- 14. is 180 degrees. This is a straight angle. A straight angle changes the direction to point the opposite way. Sometimes people say "You did a complete 180 on that!" ... meaning you completely changed your mind, idea or direction
Down
- 1. Geometry. (of figures) having the same shape; having corresponding sides proportional and corresponding angles equal: similar triangles. 3. Mathematics. (of two square matrices) related by means of a similarity transformation
- 2. is the highest degree of its terms when the polynomial is expressed in its canonical form consisting of a linear combination of monomials. The degree of a term is the sum of the exponents of the variables that appear in it
- 3. An angle that measures more than 90 degrees but less than 180 degrees. (Compare acute angle and right angle.)
- 4. is a point where two or more straight lines meet
- 5. is a combination of two rays (half-lines) with a common endpoint. The latter is known as the vertex of the angle and the rays as the sides, sometimes as the legs and sometimes the arms of the angle
- 6. is the amount you must add to something to make it "whole". For example, in geometry, two angles are said to be complementary when they add up to 90°. One angle is said to be the complement of the other
- 9. is equal to 90 degrees. A line segment (AB) drawn so that it forms right angles with a line (CD). In geometry and trigonometry, a right angle is an angle that bisects the angle formed by two adjacent parts of a straight line
- 11. (of a bad, difficult, or unwelcome situation or phenomenon) present or experienced to a severe or intense degree
- 12. are the angles opposite each other when two lines cross. "Vertical" in this case means they share the same Vertex (corner point), not the usual meaning of up-down. In this example, a° and b° are vertical angles