Area of a Polygon

The area of a polygon with known vertex coordinates is found by the shoelace method, listing the vertices in order and cross-multiplying: for a triangle, area $=\frac{1}{2}|x_1(y_2-y_3)+x_2(y_3-y_1)+x_3(y_1-y_2)|$. The absolute value keeps the area positive regardless of vertex order.

You meet Area of a Polygon in the Coordinate Geometry chapter of SPM Additional Mathematics. Knowing the term precisely matters in the exam: questions often hinge on reading a keyword correctly, and because SPM marking is analytic, using the right definition in your working helps secure method marks.

Our teachers make sure a student can not only recite what Area of a Polygon means but use it fluently in a full solution.

Because the SPM Add Math paper is bilingual (BM/EN), it helps to know this term in each language: Area of a Polygon (EN) · Luas Poligon (BM) · 多边形的面积 (中文)

Other key terms from the Coordinate Geometry chapter you may want to check:

• Midpoint
• Gradient
• Division of a Line Segment
• Parallel Lines
• Perpendicular Lines
• Locus