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Polygon Formulas
Geometry formulas for common geometric shapes
polygon | formula |
---|---|
area of a triangle | 1/2bh |
perimeter of a parallelogram | Perimeter = a + b + a + b = 2a + 2b |
area of a rectangle | A=lw |
perimeter of a square | P=4s |
area of a trapezoid | A= (a + b)h / 2 |
perimeter of trapezoid | P=s1+s2+s3+s4 |
perimeter of a triangle | P=s1+s2+s3 |
area of a square | A=S*S or S2 |
circumference of a circle | 2*3.14*r |
area of a circle | A = πr ^2 |
area of a parallelogram | Area = b x h |
sum of interior angles (reg polygons) | 180(n-2) |
sum of interior angles | (n-2)180 |
no.of exterior angles (regular polygon) | 360/n |
no. of exterior angles equal | no. of sides |