What a Square
Students examine the painting "Old Man With A Gold Chain" by Rembrandt. They identify geometric shapes in the painting, measure these shapes and compare the relationships of these measurements.
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Constructing a square inscribed in a circle
Here is an activity that focuses on the actual construction of the square inscribed in a circle. The lesson allows for the use of dot paper or graph paper with straight edges and protractors, or dynamic geometry software programs. After...
8th - 11th Math CCSS: Designed
Visualizing Plane Figures and Square Units
Introduce learners to area and square units. They look at a bird's-eye view map of a school and answer questions about different buildings' areas. They draw squares and rectangles on a piece of graph paper and find the area of the...
3rd - 4th Math CCSS: Adaptable
Existence and Uniqueness of Square Roots and Cube Roots
Teach cube roots by building on an understanding of square roots. The third installment of a 25-part series asks learners to solve simple quadratic and cubic equations using roots. Scholars compare square roots and cube roots throughout...
8th Math CCSS: Designed
Tile Patterns I: Octagons and Squares
This can be used as a critical thinking exercise in congruence or as a teaching tool when first introducing the concept. Four octagons are arranged in such a way that a square is formed in the middle. With this information, geometry...
7th - 9th Math CCSS: Designed
Solving Quadratic Equations by Completing the Square
"The neat thing about completing the square is that it will always work," Sal explains, "no matter how crazy the problem is." A basic overview of how to complete the square, this video provides a good background for both beginning and...
4 mins 8th - 11th Math
Cover the Area of a Shape Using Square Units
This is the first of a series of four lessons designed to examine and understand the concept of area. A review of area starts the lesson, along with a discussion of different attributes that can describe a rectangle. The term square unit...
3 mins 2nd - 4th Math CCSS: Designed