Summary (Grade 11 NSC Matric Mathematics): Flashcards

$d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}$

$m = \frac{y_2 - y_1}{x_2 - x_1}$

$M = \left(\frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2}\right)$

$m_1 = m_2$

$m_1 \times m_2 = -1$

$-\frac{1}{m}$

$y = mx + c$

$m$ = gradient, $c$ = y-intercept

$ax + by + c = 0$

$m = \tan \theta$