Lesson Plan
Curated OER

Special Right Triangles

For Teachers 7th - 9th
Students identify the different parts of a right triangle. In this geometry instructional activity, students use the Pythagorean Theorem to identify missing sides and angles of a right triangle. They work with irrational and rational roots.
Lesson Plan
Curated OER

A Sphere and Its Net

For Teachers 8th - 12th
Learners identify and sketch the nets for sphere. For this geometry lesson, students differentiate between two and three dimensional shapes. They find the surface area of each sphere.
Lesson Plan
Curated OER

Surface Area of Prisms

For Teachers 9th - 11th
Students calculate the surface area of different prisms. In this geometry lesson, students identify the shapes of solids based on the properties of that solid. They calculate the surface area using nets and properties of prisms.
Lesson Plan
Curated OER

Surface Area of Spheres

For Teachers 9th - 12th
High schoolers 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.
Worksheet
Houghton Mifflin Harcourt

Similar Polygons and Circles

For Students 9th - 12th
In these similar polygons and circles worksheets, students complete 15 questions including 9 word problems regarding similar polygons. Students then complete 15 questions including 1 word problem involving circumference, area, and arc...
Lesson Plan
Curated OER

Proportional Similarities

For Teachers 8th - 10th
Students model the geometric relationship with graphing. In this geometry lesson, students differentiate between parallel, perpendicular, similar and congruent shapes. They use properties of polygons to differentiate their shapes...
Lesson Plan
Curated OER

Determine the Coordinate of Transformations

For Teachers 8th - 11th
Students investigate transformation on a coordinate plane. In this geometry lesson, students identify pairs of coordinates and their location on the grid. They perform rotation and reflection of each polygon.
Lesson Plan
Curated OER

Inscribed Right Triangles

For Teachers 7th - 9th
Students calculate the measurements of the inscribed angles of a triangle. In this geometry activity, students relate the hypotenuse of a right triangle and the diameter of a circle to each other. They calculate the diameter of a circle...
Worksheet
Curated OER

Area of a Parallelogram

For Students 10th
In this area of a parallelogram learning exercise, 10th graders determine the measurement of 10 different parallelograms illustrated. First, they multiply the base of the parallelogram times its height to determine the area. Then,...
Worksheet
Curated OER

Surface Area and Volume

For Students 10th
In this surface area and volume worksheet, 10th graders solve 10 different problems that includes various types of solids and cylinders. First, they determine the surface area for each figure given certain measurements. Then, students...
Worksheet
Curated OER

Area of Polygons

For Students 6th - 8th
In this math worksheet, middle schoolers find the area and perimeter of the regular and irregular polygons. They pay attention to use the proper measurements for calculation.
Worksheet
Curated OER

Identify Similar Triangles With Proofs

For Students 10th - 12th
In this similar triangle instructional activity, students write a two-column proof to explain why determined triangles are similar. Given some line lengths and angle measurements, students use proofs to identify the ratio of specified...
Worksheet
Curated OER

Interior and Exterior Angles

For Students 10th
For this interior and exterior angles worksheet, 10th graders solve 10 different problems that include determining the interior and exterior of various triangles. They determine the measure of an exterior angle and then they determining...
Worksheet
Curated OER

Quiz: Angles and Arcs in Circles - Central and Inscribed

For Students 10th - 12th
In this angles and arcs in circles activity, students determine the angle and arc measurement in a circle from given information. This one-page activity contains ten problems.
Worksheet
Curated OER

Finding Volume

For Students 10th
In this volume worksheet, 10th graders solve 10 different problems that include various types of figures. First, they determine the volume of a prism, pyramid, cylinder, cone, and a sphere as shown. Then, students determine the surface...
Worksheet
Curated OER

Circles

For Students 10th
In this circles worksheet, 10th graders solve and complete 8 different types of problems. First, they find the measures of each segment given the center of a circle. Then, students find the length of a side of a triangle shown within a...
Worksheet
Curated OER

Angles

For Students 4th - 6th
For this angles worksheet, students classify and measure a set of 12 angles. An answer key is included A website reference is given for additional resources.
Worksheet
Curated OER

Angles

For Students 4th - 6th
In this angles instructional activity, students classify and measure a set of 12 angles. A website reference for additional activities is given.
Lesson Plan
Curated OER

Length, Perimeter and Area

For Teachers 9th - 10th
Learners analyze characteristics and properties of two- and three-dimensional geometric shapes and develop mathematical arguments about geometric relationship
Worksheet
Curated OER

Seeing Solar Storms in STEREO-II

For Students 11th - 12th
In this solar storms worksheet, students use a diagram given the location of two STEREO spacecraft satellites, a coronal mass ejection, the sun and the Earth to solve 2 problems about the coronal mass ejection. Students use segments,...
Lesson Plan
Curated OER

Grasping Geometry

For Teachers 3rd - 4th
Students investigate geometric shapes in their environment, make a geometric design, and write paragraphs describing the design.
Lesson Plan
Curated OER

"Sir Cumference and the First Round Table" by Cindy Neuschwander

For Teachers 6th - 8th
Students study geometric terms related to circles and solve the problem posed in the book.
Worksheet
Curated OER

Triangle Fundamentals

For Students 8th - 12th
In this geometry worksheet, students observe a triangle marked with three angles and are given two measures to find the missing third measure. A second diagram is given with six angles. There are 20 questions.
Lesson Plan
Curated OER

Bedroom Redecoration Project

For Teachers 5th - 7th Standards
In this bedroom redecoration project, your young mathematicians become interior designers. They plan, draw, and determine finances for the project. They apply their knowledge of working with decimals, geometric shapes, and problem...

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