Coordinate Geometry Level 2 MCQs: Section Formula, Centroid and Lines
This Level 2 coordinate geometry MCQ set on Aptitude360 is for learners who have finished the basic formulas and want medium-level, multi-step practice. It covers the distance, section and midpoint formulas, centroid, area, collinearity, slopes and equations of straight lines. Every question has a worked solution.
Topics covered in this coordinate geometry set
- Distance formula, perimeter of a triangle and points on an axis equidistant from two given points
- Section formula, and the ratio in which an axis or a given point divides a segment
- Midpoint and centroid, missing vertices and the length of a median
- Area of triangles and quadrilaterals, and collinearity of points
- Slope, angle of inclination, and parallel and perpendicular lines
- Equations of lines, intercepts and the triangle a line forms with the axes
- Reflections in the axes and the origin, and vertices of a parallelogram
Key coordinate geometry formulas to revise
- Distance: \( d=\sqrt{(x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2}} \)
- Internal division in ratio \( m:n \), x-coordinate: \( x=\dfrac{mx_{2}+nx_{1}}{m+n} \)
- Centroid, x-coordinate: \( x=\dfrac{x_{1}+x_{2}+x_{3}}{3} \)
- Slope, when \( x_{1}\neq x_{2} \): \( m=\dfrac{y_{2}-y_{1}}{x_{2}-x_{1}} \)
- Perpendicular lines, when both slopes are defined: \( m_{1}\times m_{2}=-1 \)
- Intercept form: \( \dfrac{x}{a}+\dfrac{y}{b}=1 \)
Revision tips for coordinate geometry MCQs
- To find the ratio in which the y-axis divides a segment, set the x-coordinate of the dividing point to zero; for the x-axis, set the y-coordinate to zero.
- Three points are collinear exactly when the triangle they form has zero area.
- The diagonals of a parallelogram bisect each other, so equate their midpoints to find unknown vertices.
Who this Level 2 set suits
It suits aptitude and school-level maths learners who know the basics and want mixed practice before moving to harder levels.