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Bisect Angle Teacher Resources
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Apply geometric properties and formulae for surface area and volume by constructing a three-dimensional model of a city. Learners use similar and congruent figures and transformations to create a city of at least 10 buildings. They trade with classmates, who calculate surface area and volume of some of the structures. Refers to a Discovery Education video/DVD to support and enrich the project; a link takes you to a website to order it. Charts mentioned are not attached.
Tenth graders explore quadrilaterals and triangles. In this geometry lesson, 10th graders examine kites, trapezoids, parallelogram, rectangle, rhombi, squares, and triangles and explore the properties of the various figures. The dynamic nature of the geometry utility facilitates measurement and conjecture regarding the properties.
Eleventh graders discover the properties of the points of concurrency of a triangle. In this geometry lesson, 11th graders use paper folding, interactive geometry software, and construction to investigate the points of concurrency. Use of a real world problem provides context for the lesson.
Tenth graders define the orthocenter of a triangle. In this triangles lesson plan, 10th graders draw and label a triangle shown and construct the altitudes to locate the orthocenter. Students hide the altitudes and drag the triangle to explain where the orthocenter is located for different types of triangles. Students also construct a nine-point circle for a new figure formed and compare it to the original figure.
Fourth graders work in groups to create intersecting lines on geoboards. They discuss knowledge of polygons. Students complete a "Properties of the Quadrilateral Famly" chart as the class combines information from their geoboards and discusses the shapes that have been created. Students complete Venn Diagrams to compare properties of quadrilaterals.
In this review worksheet, learners identify the characteristics of intersecting and parallel lines They explore vertical, supplementary, alternate interior, alternate exterior and corresponding angles. This two-page worksheet contains approximately 50 multiple-choice problems.