Area of Four-Sided Shapes with Parallel Sides

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Grade 7 Math · Area of Triangles, Parallelograms and Trapezoids

Area of Four-Sided Shapes with Parallel Sides

Area worksheet for Grade 7, in mm, cm, and m: two shapes with one pair of parallel sides, two parallelograms, and two rhombi, each from its base and height. With an answer key.

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Skill

Area of Triangles, Parallelograms and Trapezoids Worksheets

Pages

Last updated

October 28, 2026

Time

About 15 minutes

Answer key

Included

Goes with

Area of Trapezoids, Parallelograms, and Rhombi

Printing

Black and white

Related curriculum

Find the area of parallelograms, triangles and trapezoids by cutting and moving parts to make rectangles, then with their formulas, and find the area of shapes made of these.

Reviewed by Mr. Daniel Carter, Teacher. How we check worksheets

How to use this sheet

Have the child mark the base and the height of each shape before using a formula.
Show why a triangle is half a rectangle by drawing the rectangle around it.
For composite figures, have the child split the shape and label each part with its area.

Common mistakes

Using a slanted side as the height. The height is straight up from the base, at a right angle.
Forgetting to halve for a triangle, so the area is base × height.
For a trapezoid, using only one base. Add the two parallel sides, then halve and multiply by the height.