Khan Academy
Review the equation of a circle and practice solving problems related to it.
Khan Academy
Review of how to calculate the area of circles.
Area of a parallelogram (video) - Khan Academy
The formula for quadrilaterals like rectangles and parallelograms is always base times height. The formula for a circle is pi to the radius squared. Also these questions are not useless.
Khan Academy
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可汗学院 - Khan Academy
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खान अकेडमी - Khan Academy
ओह! लगता है कुछ गड़बड़ हो गई। कृपया पुन: प्रयास करें। अरे नहीं, लगता है कोई त्रुटि आ गई है। आपको रिफ्रेश करना पड़ेगा। यदि इसके बाद भी यह समस्या बनी रहती है ...
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खान अकेडमी - hi.khanacademy.org
खान अकेडमी - hi.khanacademy.org
Khan Academy
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Khan Ακαδημία
Μάθετε δωρεάν μαθηματικά, τέχνη, προγραμματισμό, οικονομικά, φυσική, χημεία, βιολογία, ιατρική, ιστορία, και άλλα. Η Ακαδημία Khan είναι ένας μη κερδοσκοπικός οργανισμός με αποστολή την παροχή δωρεάν, παγκοσμίου ...