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What`s Your Line?
... 3. Say: “The rope that A and C are holding is parallel to the rope B and D are holding.” Write on the overhead, Parallel lines are lines that never intersect. Have students write this definition in their math journal. 4. Have C and D move toward each other until their ropes cross. Say, “The ropes ar ...
... 3. Say: “The rope that A and C are holding is parallel to the rope B and D are holding.” Write on the overhead, Parallel lines are lines that never intersect. Have students write this definition in their math journal. 4. Have C and D move toward each other until their ropes cross. Say, “The ropes ar ...
Section 9.1
... Parallel Lines Cut by a Transversal If two parallel lines are cut by a transversal, then the measures of corresponding angles are equal and alternate interior angles are equal. ...
... Parallel Lines Cut by a Transversal If two parallel lines are cut by a transversal, then the measures of corresponding angles are equal and alternate interior angles are equal. ...
Endpoint line ray line segment parallel lines perpendicular
... 3. Lily drew the three triangles above. Draw all possible lines of symmetry on each of Lily’s triangles. Lily was surprised to discover that not all triangles have the same number of lines of symmetry. Explain why some triangles have more lines of symmetry than others. ...
... 3. Lily drew the three triangles above. Draw all possible lines of symmetry on each of Lily’s triangles. Lily was surprised to discover that not all triangles have the same number of lines of symmetry. Explain why some triangles have more lines of symmetry than others. ...
Angles, Parallel Lines, and Transversals
... 3. What is the symbol that represents parallel lines? 4. What are skew lines? 5. Compare parallel lines and skew lines. 6. What is a transversal? 7. Use the space below to sketch a pair of parallel lines and a transversal. Identify each as parallel or transversal. 8. How many angles are formed when ...
... 3. What is the symbol that represents parallel lines? 4. What are skew lines? 5. Compare parallel lines and skew lines. 6. What is a transversal? 7. Use the space below to sketch a pair of parallel lines and a transversal. Identify each as parallel or transversal. 8. How many angles are formed when ...
VOCABULARY: Parallel lines, parallel planes, skew lines
... transversal intersects parallel lines. Slope and forms for the equation of a line are reviewed, problems are solved by writing linear equations and using the slope to determine if liens are parallel, perpendicular, or neither. Student understanding of parallel and perpendicular lines are expanded to ...
... transversal intersects parallel lines. Slope and forms for the equation of a line are reviewed, problems are solved by writing linear equations and using the slope to determine if liens are parallel, perpendicular, or neither. Student understanding of parallel and perpendicular lines are expanded to ...
Contour line
A contour line (also isoline, isopleth, or isarithm) of a function of two variables is a curve along which the function has a constant value. It is a cross-section of the three-dimensional graph of the function f(x, y) parallel to the x, y plane. In cartography, a contour line (often just called a ""contour"") joins points of equal elevation (height) above a given level, such as mean sea level. A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness of slopes. The contour interval of a contour map is the difference in elevation between successive contour lines.More generally, a contour line for a function of two variables is a curve connecting points where the function has the same particular value. The gradient of the function is always perpendicular to the contour lines. When the lines are close together the magnitude of the gradient is large: the variation is steep. A level set is a generalization of a contour line for functions of any number of variables.Contour lines are curved, straight or a mixture of both lines on a map describing the intersection of a real or hypothetical surface with one or more horizontal planes. The configuration of these contours allows map readers to infer relative gradient of a parameter and estimate that parameter at specific places. Contour lines may be either traced on a visible three-dimensional model of the surface, as when a photogrammetrist viewing a stereo-model plots elevation contours, or interpolated from estimated surface elevations, as when a computer program threads contours through a network of observation points of area centroids. In the latter case, the method of interpolation affects the reliability of individual isolines and their portrayal of slope, pits and peaks.