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perimeters 2d shapes
perimeters and areas of 2D shapes
Term | Definition |
---|---|
Rectangle | Area = lw Perimeter = 2l + 2w |
Square | Area = 4s Perimeter = s^2 |
Parallelogram | Area = bh Perimeter = 2(b + a) |
Rhombus | Area = bh Perimeter = 4b |
Triangle | Area = (1/2)bh Perimeter = a + b + c |
Kite | Area = (1/2)d1d2 Perimeter = a + b + c + d |
Trapezoid | Area = (1/2)h(b1 + b2) Perimeter = 2a + b1 + b2 |
Circumference of circle | c=π•d |
Area of square | a=s^2 |
Area of rectangle | A=l•w |
Area of triangle | A=l•w/2 |
Area of parallelogram/rhombus | A=b•h |
Area of trapezoid | A=(b1+b2)/h |
Area of circle | A=πr^2 |
Perimeter of square | P=s•4 |
Perimeter of rectangle | P=l+w+l+w |
Perimeter of quadrilateral | s+s+s+s |
Segment | Area of sector-area of triangle |
Regular Polygon | ½Pa |
Sector | x/360×πr² |
Perimeter | Distance around a shape. |
Area | Number of square units used to fill up a shape. |