Curated OER
Triangle Side Lengths and Angles Measures
Students identify missing sides and angles. In this geometry lesson, students use triangular theorems to identify the missing sides. They use the Pythagorean Theorem to find the different ratios of each side.
Curated OER
Geometry, Measurement & Reasoning
Learners complete worksheets involving rotational symmetry. In this geometry lesson, students complete worksheets to identify rotational symmetry and rotations. They compare and contrast rotated figures. Learners examine the relationship...
Curated OER
Shape and Space In Geometry
Middle schoolers read about the background of geometry in general to tap prior knowledge of the fundamentals. Then they use an application activity of measuring that is online and interactive for the student.
Curated OER
Measurement of a Central Angle
Students calculate the measurement of a central angle. In this geometry lesson, students identify properties of circles. They use Cabri software to create and analyze graphs.
Curated OER
Arc Measurement Based on The Measurement of a Central Angle
Students define keywords that are important to solve problems. In this geometry lesson, students find the arc length and angle of a circle. They convert between radians and degrees.
Curated OER
Intersecting Lines and Segments of Measures
Mathematicians measure intersecting lines-and circles, and create chords. In this geometry lesson, students explore interrior and exterior chords created by tangent and secant lines. These segments can be inside the circleor outside the...
Curated OER
Geometry, Measurement & Reasoning
Students construct two-column proofs. In this geometry lesson, students use deductive reasoning and geometric properties to justify given geometric statements. Students compare and contrast proofs.
Curated OER
Geometry Review Quiz
Young scholars conduct a review that is done right before having a geometry quiz. They cover major topics that are part of the assessment. They use review cards as notes to pass to one another to reinforce the concepts before putting...
Curated OER
Measuring Length: Practice A
Ninth graders investigate the segment addition postulate. In this geometry lesson, 9th graders explore the difference between equal and congruent in relation to segment length. The lesson includes an algebra application and a...
Curated OER
Measurement
Middle schoolers create two prisms out of the same paper. They calcuate the number of centimeter cubes needed to fill each prism. They discover the concept of volume.
Curated OER
Graph Paper Patterns
Young artists divide a piece of graph paper into sections using rectangles, squares, and triangles. They then fill each section with patterns of shape and color. Elementary graders describe how their patterns are organized. Secondary...
Discovery Education
Discovering Math: Exploring Geometry
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...
EngageNY
Scale Drawings
Are you searching for a purpose for geometric constructions? Use an engaging approach to explore dilations. Scholars create dilations using a construction method of their choice. As they build their constructed dilation, they...
Virginia Department of Education
Geometry and Volume
The history of math is fascinating! Utilize a woodcut primary source image from 1492 and posters from the 1930s to help geometers apply their volume-calculation skills to real-life questions.
Mascil Project
Teaching Geometry Through Play
Puzzle your way through to a new understanding of area. Scholars learn about the area of polygons through equidecomposability, the idea that polygons that can be decomposed into the same set of pieces have the same area. By using...
Las Cumbres Observatory
The Cosmic Distance Ladder: Parallax
Scientists don't have a ruler long enough to measure to the stars, so they rely on math. Scholars learn to calculate the distance from Earth to a star using the parallax method. They use angle measures from different perspectives to...
Illustrative Mathematics
Two Wheels and a Belt
Geometry gets an engineering treatment in an exercise involving a belt wrapped around two wheels of different dimensions. Along with the wheels, this belt problem connects concepts of right triangles, tangent lines, arc length, and...
Curated OER
Distance Formula
Students calculate the distance formula. In this geometry lesson, students find the distance between two points on a coordinate plane. They identify the four different quadrants.
Curated OER
Quadrilateral Bunny
Students identify the properties representing quadrilateral. In this geometry lesson, students differentiate between special and regular quadrilaterals. They discuss and demonstrate hierarchy of quadrilaterals.
Curated OER
The Fractal Coast
Young scholars investigate measuring as it relates to the real world. In this geometry lesson, students measure distances as they discuss fractals and how it relates to measuring. They measure both linear and non-linear distances.
Curated OER
Paper Bag Skits
Students discover math measurements by creating a skit with classmates. In this geometry lesson, students utilize objects in a paper bag and index cards to create a short skit focusing on debate over the size of the objects....
Curated OER
Putting Your Best Foot Forward
Third graders measure their feet and their parents' feet, record data on computer-generated graphs, and calculate and record mean, median, and mode.
Curated OER
How Tall Is It?
Students identify how tall a tree is. In this measurement lesson, students use "luminometers" to measure a tree and complete a data sheet.
Curated OER
He Came Out Of Nowhere!
Young scholars calculate the traveled speed and distance of a robot. In this geometry lesson, students use the distance formula to manipulate and use to solve for the required variable. They calculate answers where two...
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