2 Geometry Mathisen Name: ___________________________________ Period: __________ 3.5 Geometry Pad Activity Directions: Follow the steps below. When you have completed each step, save your document as 3.5 Sketch 1.) Open a new sketch; go to settings and make sure your grid lines and show axes are ON. 2.) -­‐Find the line tool at the bottom, choose line. -­‐Tap two points to form a line with points A(-­‐3, -­‐2) and B(3, 1) 3.) Describe the line. Is it positive or negative? Is it steep or flat? Can you estimate the slope? Can you estimate the y-­‐intercept? 4.) Calculate the slope of the line. Is it close to your guess? 5.) Write the equation of the line in y=mx+b form. 6.) -­‐Find the ruler tool at the bottom, choose measurements. -­‐Tap the line to see the slope and the equation. Check your calculations. 7.) Write the equation of a line that is parallel to this line. How will you pick your x & y points?  Slope = ___________ 8.) Plot the parallel line that you created. Check the measurements tool to verify your slope  . 2 Geometry Mathisen **Repeat the steps with a different line and create a line that is perpendicular. 1.) 2.) 3.) 4.) 5.) 6.) 7.) 8.) Open a new sketch; go to settings and make sure your grid lines and show axes are ON. -­‐Find the line tool at the bottom, choose line. -­‐Tap two points to form a line with points A(1, -­‐5) and B(-­‐2, 4) Describe the line. Is it positive or negative? Is it steep or flat? Can you estimate the slope? Can you estimate the y-­‐intercept? Calculate the slope of the line. Is it close to your guess? Write the equation of the line in y=mx+b form. -­‐Find the ruler tool at the bottom, choose measurements. -­‐Tap the line to see the slope and the equation. Check your calculations. Write the equation of a line that is perpendicular to this line. How will you pick x, y points? ⊥ Slope = ___________ Plot the parallel line that you created. Check the ruler/measurements tool to verify your slope.