Area of Triangles in cm and m
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Area of Triangles in cm and m
Area of triangles worksheet in metric units: twelve triangles drawn to scale, measured in mm, cm and m, from plain ones to obtuse, turned and right triangles, some with extra sides to ignore. With an answer key.
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- Pages
- 2
- Last updated
- Time
- About 15 minutes
- Answer key
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- Area of Triangles
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- Black and white
- Related curriculum
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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.
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