غسالة تعريف
A washer or annulus is the region between two concentric circles which have different radii. The area of a washer = π (R2 − r2)
تعاريف ذات صلة
مصادر
“Annulus.” Mathwords, www.mathwords.com/a/annulus.htm.
A washer or annulus is the region between two concentric circles which have different radii. The area of a washer = π (R2 − r2)
“Annulus.” Mathwords, www.mathwords.com/a/annulus.htm.