Curated OER
Geometry Practice: G.G.28 #1: Congruent Triangles
In this congruent triangles worksheet, students solve four multiple choice problems. Students determine which statement is the appropriate reasoning to say that two triangles are congruent.
CK-12 Foundation
Finding the Distance Between Two Points: Lesson
Point out an application of Pythagoras. The segment of an essential playlist on geometry provides a quick review of the Pythagorean Theorem. Using a right triangle to show the positions of two points, the presenter calculates the...
CK-12 Foundation
Perpendicular Lines in the Coordinate Planes: Lesson
Get the slope right with two easy steps. By placing two perpendicular lines on the coordinate plane, the video determines the relationship of the slopes of the two line lines. The resource is a part of an informative and extensive...
CK-12 Foundation
Midsegment Theorem: Lesson
Use half the length to connect the midpoints. A section of a playlist on geometry introduces the concept of a midsegment of a triangle and how to find it. The video states the properties of the midsegment which make up the Midsegment...
CK-12 Foundation
Dilation in the Coordinate Plane: Lesson
Multiply coordinates to either shrink or enlarge a figure. An informative segment of a geometry playlist introduces dilation on the coordinate plane. The dilations in the resource use the origin as the center of dilation, which makes...
CK-12 Foundation
Transformation - Translation: Lesson
Develop a prime example of sliding about the coordinate plane. Using figures on the coordinate plane, a segment of an extensive geometry playlist introduces the transformation of translations. The presentation uses coordinate notation to...
CK-12 Foundation
Transformation - Rotation: Lesson
Change places by pivoting the figure. The section of a geometry playlist introduces rotations by making the connection to rotational symmetry. The presentation provides formulas to use with the coordinates when rotating a figure around...
EngageNY
The Motion of the Moon, Sun, and Stars—Motivating Mathematics
What does math have to do with the behavior of the earth and sun? Learn how the movement of celestial bodies has influenced the development of trigonometry. Scholars connects the details in mathematics to their...
Domain of Science
The Map of Mathematics
How does all this math fit together? The resource creates a graphical view of the extent of mathematics. The map shows the pure and applied sides of studying mathematics and breaks them down into their many disciplines.
Curated OER
The Greedy Triangle-Intro to Geometric Shapes
In this geometry lesson, learners read The Greedy Triangle and use geoboards to construct geometric shapes. They identify the number of sides and angles each shape has.
Curated OER
Operation Spaghetti
Find the math in recipes. Young chefs will follow a recipe and investigate the total cost for materials. They measure amounts of food necessary for the recipe and compute the per person cost.
Curated OER
Geometry Straws
Students create different angles and shapes by using different lengths of straws. In this geometry straws lesson plan, students glue straws onto paper and define what they have made.
Curated OER
Geometry and Quilting
Students create a quilt square for a class quilt using at least three, two-dimensional geometric figures. They research and write a brief description of at least two different quilt patterns that they find. Pupils discuss that quilts are...
Curated OER
Geometry History Lesson
Tenth graders investigate the early history of geometry. For this geometry lesson, 10th graders investigate translations, rotations, and reflections. They also solve problems with line of symmetry and rotational symmetry while reviewing...
Curated OER
Geometry: Regents Exam
In this geometry worksheet, 10th graders review geometric concept including angles, polygons, quadrilaterals, trig and circles. They take a comprehensive exam covering topics on the Regents exam. There are 32 pages in this booklet.
Curated OER
Geometry and Rubik's Cube
Students explore geometry using a Rubik's Cube. In this 2-D and 3-D shapes lesson, students use the Rubik's Cube to find the center, edge and corner pieces. Students then find the dimensions of the Rubik's Cube and read the solution...
Curated OER
All A-buzz About Math
Second graders participate in Math-Eze activities to comprehend word problems. In this word problem instructional activity, 2nd graders recognize why a hexagon is the best shape for a beehive. Students calculate how far bees must travel...
Curated OER
Getting It Right! An Investigation of the Pythagorean Theorem
Learners construct a variety of right triangles using a right-angled set square, cutting corners from pieces of paper or cardboard, and using dynamic geometry software. They measure the sides of these various right triangles and record...
Khan Academy
SAT Prep: Test 5 Section 7 Part 5
Geometry problems on the SAT are often the most difficult for students to solve, let alone master. Focusing on several geometry-related skills (as well a few algebra problems), Sal makes this lesson a valuable resource for viewers who...
Curated OER
Exploring Polygons and The Greedy Triangle
Excellent instructional activity! Anne Linehane's geometry story, The Greedy Triangle, offers an opportunity to practice forming various types of polygons with your learners. Using elastic bands (or Chinese jump...
Khan Academy
Distance Formula, Analytic Geometry, Geometry
Explaining the distance formula as "an application of the Pythagorean Theorem" might relieve some of your young mathematicians who are scratching their heads at all the new concepts. Sal demonstrates how to take the distance between any...
Khan Academy
SAT Prep: Test 8 Section 8 Part 3
The final video of the SAT practice series takes students through increasingly complicated algebra and geometry problems, but Sal works steadily through each mathematical process. At the end of the video he tells students that they are...
Khan Academy
SAT Prep: Test 2 Section 3 Part 2
Questions 5-8 on the practice SAT, which range from algebraic equations to geometry problems, are easy to understand after Sal works his math magic. Students who have a hard time transitioning between skills would benefit from a viewing...
Curated OER
SAT Prep: Test 4 Section 4 Part 3
Math students who have a hard time with the speed of their problem solving will benefit from this video. Sal tackles increasingly complicated geometry and algebra problems in a way that shows them how to find the correct answer - quickly.
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