Math Drills
Area Review
3Finding the Area
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What this worksheet covers
- Topic
- Area
Formulas and the places they belong get settled here: base times height divided by 2 for a triangle, base times height for a parallelogram, and top side plus bottom side times height divided by 2 for a trapezoid. The work extends to rhombuses and kites, to recovering a side length from an area, and to picking out triangles of equal area.
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With an obtuse triangle whose height falls outside it, using the length of the slanted side as the height is the standard error. Where a triangle carries a length that is not needed, children multiply every number shown. Dropping the divide-by-2 leaves an answer exactly twice the correct one.
The formulas fixed for rectangles and squares in Area in grade 4 are extended here to triangles, parallelograms, trapezoids and rhombuses, each with a formula of its own. This idea of finding a surface from its edges widens in grade 6, when Area of a Circle brings pi into the calculation.
- Area of a Triangle · Calculation1 question
- Area of a Triangle · Height Outside the Triangle (Obtuse)1 question
- Area of Rhombuses and Kites · Rhombus1 question
- Area of Rhombuses and Kites · Rhombus (Half-Diagonals)1 question
- Area of Rhombuses and Kites · Kite1 question
- Area of a Parallelogram · Calculation1 question
