Understanding Perimeter and Area of Geometric Figures
Explore the concepts of perimeter and area in geometric figures including squares, triangles, rectangles, parallelograms, and trapeziums. Learn how to calculate the perimeter and area of these shapes through simple formulas and examples provided in an informative presentation. Visual aids will aid in enhancing comprehension.
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Presentation Transcript
Perimeter The perimeter of a closed plane figure is the length of its boundary. 8cm 10cm 7cm 8cm 15cm Perimeter = 15 + 8 + 10 + 8 + 7 = 48cm
Perimeter Square Triangles Rectangle b=4cm b c L= 8cm a L=6cm P = 8 + 5 + 8 + 5 P = 6 + 6 + 6 + 6 P = a + b + c P = l + b + l + b P = l + l + l + l = 2(l + b) = 4l or 4s
Area Area is the space within the boundary of a figure.
Area of parallelogram height base Area of parallelogram = base x height
Area of a triangle h h h b b b Area = x base x height
Area of trapezium D K A B C H Area of trapezium ABCD = area of ABC + area of ACD = ( x BC x AH) + ( x AD x CK) = x AH x (BC + AD) = x height x sum of parallel sides
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