Our Earth and the Moon
Explore mathematical concepts and practice problems
Unveiling the Moon: Shape and Size
Ratios and Unit Rates, Similarity and Trigonometric Ratios, Circle Area and Circumference
Explore the fascinating history of how humans used observations of the Moon and lunar eclipses to mathematically determine its true shape and size. This lesson…
The Eerie Coincidence: Sun and Moon's Apparent Equal Size
Ratios and Unit Rates, Similarity and Trigonometric Ratios
Explore how the concept of similar triangles and the apparent equal size of the Sun and Moon from Earth can be used to determine the ratio of the Sun's size to…
How far is the Moon?
Ratios and Unit Rates
Explore the historical journey of how ancient scholars calculated the distance to the Moon using the powerful concepts of rates and ratios. This lesson allows m…
Measuring Earth: The Geometry of Our World
Circle Area and Circumference, Similarity, Ratios and Unit Rates
Discover how ancient humans used shadows and geometry to calculate the Earth's size. Explore properties of circles, parallel lines, and ratios and proportions w…