* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Equilateral triangle: A triangle with 3 sides the same length
Survey
Document related concepts
Plane of rotation wikipedia , lookup
Regular polytope wikipedia , lookup
Technical drawing wikipedia , lookup
Line (geometry) wikipedia , lookup
Tessellation wikipedia , lookup
Rotation formalisms in three dimensions wikipedia , lookup
Perceived visual angle wikipedia , lookup
History of trigonometry wikipedia , lookup
Multilateration wikipedia , lookup
Pythagorean theorem wikipedia , lookup
Compass-and-straightedge construction wikipedia , lookup
Rational trigonometry wikipedia , lookup
Integer triangle wikipedia , lookup
Trigonometric functions wikipedia , lookup
Transcript
Equilateral triangle: A triangle with 3 sides the same length. Isosceles triangle: A triangle with 2 sides that are the same length. Scalene triangle: A triangle with no sides the same length. Square: A quadrilateral with 4 sides the same length and 4 angles the same measure. ***All squares are rectangles, but not all rectangles are squares. Rectangle: A quadrilateral with opposite sides the same length and 4 angles of the same measure. Parallelogram: A quadrilateral with opposite sides the same length and opposite angles of the same measure. Investigation 1.2 Reflection Symmetry: two halves that are mirror images of each other. Line of Symmetry: A line that if a shape is folded over this line the two halves of the shape would match exactly. Rotation Symmetry: A shape has rotation symmetry if it can be rotated less than a full turn around its center point to a position where it looks exactly as it did before it was rotated. Investigation 1.3 Regular Polygon: A polygon in which all the sides are the same length and all the angles have the same measure. Irregular Polygon: all sides are not the same length or all the angles are not the same measure. Congruent: same angles, same shape, same size. Tiling: covering a flat surface with shapes that fit together without any gaps or overlaps. Investigation 2.1 Right angle: has a measure of 90 degrees. This is the benchmark we use to help us estimate angles of other polygons. Investigation 2.5 Parallel Lines: Lines on a plane that never meet. These lines are straight and extend forever in two directions. Transversal: A line that intersects 2 or more lines. Ex) Acute angle: An angle with a measure less than 90 degrees. Obtuse angle: An angle with a measure greater than 90 degrees and less than 180 degrees. Straight angle: An angle with a measure exactly 180 degrees. Perpendicular: Two lines that intersect to form right angles. Ex) Vertex: A corner of a polygon. Supplementary angles: angles on the same side that work together to equal 180 degrees. Complementary angles: angles that work together to form 90 degrees. Alternate interior angles: In the diagram below angles 3 and 6 are alternate interior angles. 1 3 2 4 Vertical Angles: In the diagram above angles 1 and 4 and angles 2 and 3 are vertical angles. Angle sum: The sum of all the measures of the interior angles of a polygon. Angle sum formula: 180 x (n-2) Memorize the names of the regular polygons and their number of sides on page 9!