High School Resource Subtended Angle by Math Open Reference This interactive web-based resource demonstrates that a subtended angle is the angle formed by an object from a given external point. The page shows a point of view and an object that is being viewed. The subtended angle is shown as the angle of view that […]

High School Resource Area vs. Perimeter of a Triangle by Math Open Reference This interactive web-based resource shows the relationship between the perimeter and area of a triangle. It shows that a triangle with a constant perimeter does not have a constant area. The user is given a triangle with one changeable vertex and a […]

Middle School Resource Right Triangle Side Squares by The Shodor Foundation This interactive web-based resource helps students to visualize the Pythagorean Theorem. Students change the length of a side of a right triangle and, by doing so, they change the area of the squares adjoining each of the triangle’s sides. Related NY State Academic Standards: […]

Elementary School Resource Classroom Idea: Situational Ratios This lesson will use pattern blocks such as a green triangle, blue rhombus, red trapezoid, and yellow hexagon to have students discover the quantity of triangles needed to cover the blue rhombus, the red trapezoid, and the yellow hexagon. Related NY State Academic Standards: 1.MD.2, 1.G.1, MST3.1.PS.8, and […]

High School Resource New Angles on Art by NGA Do art and math have anything in common? How do artists and architects use math to create their works? In these lessons, students will explore the intersection of math and art in the works of two artists and one architect for whom mathematical concepts (lines, angles, […]

Middle School Resource Identifying Lines of Symmetry Give students cut-out block letters and mirrors. Have them decide how they may want to identify the lines of symmetry of each letter. Related NY State Academic Standards: 4.G.3, MST3.4.R.5, MST3.5.G.11 and more! Be sure to check out our Educational Resources, featuring thousands of activities, lesson plans, constructed-response […]

High School Resource Properties of Parallelograms by ECSDM This lesson is used classify figures according to their characteristics and begin coordinate geometry proofs. The figures included in this lesson are parallelograms, special parallelograms, trapezoids, kites and different types of triangles. Related NY State Academic Standards: G-CO.11, MST3.G.RP.7, MST3.G.RP.8 and more! Be sure to check out […]

Elementary School Resource Basic Geometric Shapes by St. Lawrence-Lewis BOCES Fourth grade students will learn that a polygon is a simple closed curve with sides made of line segments. Students will identify a triangle, quadrilateral, pentagon, hexagon, and octagon by the number of sides and number of angles/vertices. Related NY State Academic Standards: 4.G.2, MST3.4.G.1 […]