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Area and perimeter

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Intro to area and unit squaresMeasuring rectangles with different unit squaresMeasuring area with partial unit squaresCreating rectangles with a given area 1 Creating rectangles with a given area 2
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Transitioning from unit squares to area formulaFinding missing side when given areaCounting unit squares to find area formulaArea of rectangles review
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Perimeter: introductionPerimeter of a shapeFind perimeter by counting unit squaresFinding perimeter when a side length is missing Finding missing side length when given perimeterPerimeter & areaPerimeter and unit conversionApplying the metric system to perimeterPerimeter review
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Area of a parallelogramArea of parallelograms
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Area of a triangle on a gridArea of a quadrilateral on a grid
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Area of trapezoidsArea of kitesFinding area by rearranging partsArea of composite shapesPerimeter & area of composite shapesChallenge problems: perimeter & area
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Radius, diameter, circumference & πLabeling parts of a circleRadius, diameter, & circumferenceCircumference reviewRadius & diameter from circumferenceArea of a circleArea of circles reviewArea of a circle intuition
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Area of equilateral triangleArea of equilateral triangle (advanced)Area of diagonal-generated triangles
Test your understanding of Area and perimeter with these 15 questions.

About this unit

Area and perimeter help us measure the size of 2D shapes. We’ll start with the area and perimeter of rectangles. From there, we’ll tackle trickier shapes, such as triangles and circles.