What are parallel and perpendicular lines ... Calculating angles Learn how to solve problems about angles made between straight lines. Angles in polygons Learn how to use a formula to find ...

Two examples are \(y = 3x - 2\) and \(y = 3x + 11.6\). Find the equation of a straight line that is perpendicular to \(y = 2x + 1\). The gradient of \(y = 2x + 1\) is 2. The reciprocal of 2 is ...