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Surface Area of Spheres
Young scholars identify the properties of a sphere. In this geometry lesson, students calculate the surface area of spheres using the formula derived by nets. They identify the radius and diameter of the sphere.
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Incenter of a Triangle
Tenth graders explore the properties of the incenter of a triangle. In this geometry lesson, 10th graders construct a triangle and the angle bisectors of each angle. The dynamic properties of Cabri Jr. allow students to locate and...
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Sectors of Pizza
Students identify the properties of a circle. In this geometry lesson, students relate properties of diameter to sections of a pizza. They calculate the measure of an arc and missing angles.
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More Prisms/Nets
Students calculate the volume and surface are of three-dimensional shapes. In this geometry lesson, students use the nets to prove their calculations of shapes. They identify the different parts of a solid using the nets.
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Special Right Triangles
Students identify the different parts of a right triangle. In this geometry lesson, students use the Pythagorean Theorem to identify missing sides and angles of a right triangle. They work with irrational and rational roots.
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Folding to Make Shapes
Second graders identify different polygons and their attributes. In this geometry lesson, 2nd graders get to know polygons by studying the vocabulary and finding polygons in their classroom. They create these shapes and then find their...
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Location, Location, Location
Young scholars investigate the properties of triangles. In this geometry lesson, students identify the location of different polygons. They identify the different properties of triangles and polygons.
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Transformers
Students use transformation to move the graph around. In this geometry lesson plan, students observe transformation of symmetry groups. They use the TI to move the sides of the polygons around and make predictions.
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Circle Packing
Students identify different parts and properties of circles. In this geometry lesson, students identify the radius, diameter, semicircle and inscribed angle of a circle. They identify the tangent lines to a circle.
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Arithmetic Chains
Students complete a chain of numbers given the outcome. In this geometry lesson, student use deductive and inductive reasoning to solve problems. They create a formula and ways to predict numbers in the chain without starting over.
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Rectangular Gardens
Students create a rectangular garden using paper and tiles. In this geometry lesson, students investigate the largest possible rectangle that can be created given specific boundaries. They use grid paper to draw the rectangles creating a...
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Strongest Polygon
Students define and identify shapes by name. In this geometry instructional activity, students construct, identify and compare polygons based on the number of sides. They classify each shape based on their angle sum theorem.
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Cannonball
Pupils calculate the speed, motion and distance of a projectile. In this geometry lesson, students obtain measurements while calculating velocity. They graph their results and make predictions.
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Pyramids- Slant Height and Altitude
Students calculate the height and altitude of a pyramid. In this geometry lesson, students define the parts that make up a pyramid. They use the Pythagorean Theorem to find the missing parts of a pyramid.
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Distance Calculations
Young scholars calculate the distance between two points. In this geometry lesson, students use coordinates and the distance formula to find the distance. They perform an interactive lesson to solve the missing length.
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Using Geometric Shapes in Architecture
Third graders identify two and three dimensional shapes used in architectural designs by viewing images on the Internet. In this geometry lesson, 3rd graders create their own building designs and identify the geometric shapes that...
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Pythagorean Theorem
Students explore the history of Pythagoras and his contributions to mathematics. For this middle school geometry lesson, students use one inch tiles to investigate the Pythagorean Theorem and to find the length of the sides of a right...
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The Search for Pythagoras' Treasure
Students identify and define properties of triangles. In this geometry lesson, students identify the missing sides and angles of right triangles. They use the rules of the Pythagorean Theorem to solve their problems.
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Drawing Regular Polygons
Learners investigate properties of regular polygons. In this geometry instructional activity, your class will use a graphing calculator and parametric equations to construct regular polygons and investigate the relationship between the...
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Why use the Pythagorean Theorem?
Eighth graders explore the Pythagorean Theorem. In this middle school geometry instructional activity, 8th graders solve problems using the Pythagorean Theorem as they explore the definition of a theorem and attempt to determine...
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Light Bounce
Students solve problems involving triangles. For this geometry lesson, students apply properties of triangles to find the missing angles and sides. They identify angles of parallel lines cut by a transversal.
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Soccer Problem
Learners solve problems with triangles. In this geometry lesson plan, students use the properties of triangles to solve problems. They identify the median, altitude and side vs angle relationship.
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Isosceles Triangle Investigation
Students solve problems with isosceles triangles. In this geometry lesson plan, students identify and use the properties of triangles to solve their problems. They find the median, altitude, and angles to the triangles.
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Euler Characteristic
Students identify the different properties of Euler's Characteristics. In this geometry lesson, students identify the shape and surface a polygon. They relate the concept of Euler to solving real world problems.