Edexcel IGCSE Maths 復(fù)習(xí)筆記 3.7.1 Perpendicular Lines
Edexcel IGCSE Maths 復(fù)習(xí)筆記 3.7.1 Perpendicular Lines What are perpendicular lines? You should already know that PARALLEL lines have?equal?gradients PERPENDICULAR LINES do meet each other and wher...