Curated OER
Triangle Angle-Sum Theorem
In this polygons worksheet, students fill out a graphic organizer about the name of the polygon, the number of sides, the angle sums, and more. Students complete this for 5 polygons.
Curated OER
New York State Testing Program: Mathematics Test Book 1
In this mathematics test bookelt, students solve problems studied during the year.  They solve problems covering topics such as probability, angle intersection, commission, percent, exponents, similar figures, and reading and...
Curated OER
Angles
In this math worksheet, students find the measurements of angles created by intersecting lines. Students are first presented with two intersecting lines, then a pair of parallel lines with one intersecting line. The second page has an...
Kim Brassard
Solving Right Triangles
Solve that triangle! Your class examines angles and side measurements on 20 right triangles to determine the missing measurements. For some, they are given two sides while for others, they are given an angle and a side.
Curated OER
Boomerang
Students explore the concept of boomerangs. In this boomerang activity, students throw homemade boomerangs at different angles to record maximum distance and if it returned or not. Students collect their boomerang data then create a...
Curated OER
Countdown Challenge: Geometry Exploration
In this geometry worksheet, students identify and draw right angles, acute angles, obtuse angles and straight angles. This one-page worksheet contains 34 problems.
Virginia Department of Education 
Middle School Mathematics Vocabulary Word Wall Cards
Having a good working knowledge of math vocabulary is so important for learners as they progress through different levels of mathematical learning. Here is 125 pages worth of wonderfully constructed vocabulary and concept review cards....
Curated OER
Up For Change?
Students explore similar objects.  They participate in a series of hands-on, multimedia and online activities to examine how the edge length affects the angle measures, perimeters and areas of similar regular polygons.  Students find the...
Curated OER
Scaling Down the Pyramids
Students construct three-dimensional models of the three pyramids at Giza. They research the building of the pyramids and record the height, base and angle measurements of each pyramid. They create a file of facts regarding the pyramids.
Curated OER
Triangle Fundamentals Multiple Choice
In this triangles worksheet, students identify the parts of a triangle.  They determine the value of an angle measurement, and identify the characteristics of triangles.  This two-page worksheet contains 10 problems.  This...
Curated OER
Angles
In these angles worksheets, students complete several activities for angles. Students complete 34 problems about angle measurement.
Curated OER
The North (Wall) Star
Young scholars engage in a lesson which shows them that celestial navigation is the art and science of finding one's geographic position by means of astronomical observations, particularly by measuring altitudes of celestial objects -...
Curated OER
Three- and Two- Dimensional Geometry
In this three- and two- dimensional geometry worksheet, 7th graders solve 12 various problems related to geometric shapes and measurement. They first use paper and a pencil to sketch the front, side, back, top and bottom views of each...
Curated OER
Triangle Exterior Angles Theorem
Students identify the measure of missing exterior angles. In this geometry lesson,students define and apply the exterior angle theorem to solve problems. They use Cabri software to create different angles and make investigations.
Curated OER
Classify and Measure the angles
In this angles worksheet, students measure and classify angles with a protractor. Students complete the measurement of 9 angles.
101 Questions
Pizza Doubler
Double the pizza? What a great deal! Young pizza enthusiasts investigate two different coupons, one that doubles the radius and one that doubles the sector angle of a slice. They determine which coupon is the better deal. 
Curated OER
The Circle's Measure
Students explore circumference and diameter. In this math lesson, students apply their knowledge of circumference and diameter to solve mathematical riddles. Students apply this knowledge to find circumference and diameter of various...
Curated OER
Toothpick Triangles
Learners draw a chart (included in the lesson) to use with their investigation. They review terminology of triangles and receive toothpicks to use in the lesson. Beginning with three toothpicks, students form a triangle. They complete...
Curated OER
The Golden Students
Scholars view the video, "Donald Duck in Mathmagic Land," and discuss examples in nature which have proportions of the golden ratio. They measure and record different body lengths from a worksheet and convert the ratios to equivalent...
Houghton Mifflin Harcourt
Introducing the Concept: Triangles and Quadrilaterals
Guide your geometers through the process of constructing polygons. They learn how to draw triangles, squares, parallelograms, rectangles, rhombuses, and trapezoids with specified angles using a protractor and a ruler. The lesson plan...
Curated OER
Sum of Interior/Exterior Angles with Wilbur
Students identify the interior and exterior measures of polygons. In this geometry lesson, students identify the formula for interior angles of polygons. They differentiate between triangular and polygons angles.
Curated OER
Sextant Measurements
Students create a sextant.  Using their sextant, students measure the height of tall objects.  Students explore how sailors used sextants to identify their location on the ocean.  They research how sextants are created.
Curated OER
Math is Beautiful
Students explore how geometry is used on the composition of artworks by artists from different cultures.  This lesson is equally suited for a Math or Art classroom at the late-elementary or early-middle school level.
Curated OER
Math All Around Us!
Middle schoolers find math concepts in every day items. In this math concept instructional activity, students take ten photographs of things they find interesting. They analyze the photographs to find hidden math concepts such as...