Worksheet
Curated OER

Polygon Sum Conjecture

For Students 10th
In this geometry worksheet, 10th graders identify the missing angles using the polygons sum conjecture. They measure exterior and interior angles using their angle theorems. There are 63 problems.
Lesson Plan
Curated OER

Geometry Regents Questions: Isosceles Triangle Theorem

For Teachers 9th - 12th
In this isosceles triangle worksheet, students solve 19 multiple choice and short answer problems.  Students use the isosceles triangle theorem to determine unknown angle measures.
Lesson Plan
Curated OER

The North (Wall) Star

For Teachers 6th - 8th
Students engage in a instructional activity 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...
Lesson Plan
Curated OER

Trajectory Perplexity

For Teachers 11th - 12th
Students investigate measuring angles correctly through projectiles. In this geometry lesson, students launch a projectile to investigate the importance of how to measure an angle correctly and to explore trajectory. They collect...
Lesson Plan
Curated OER

Water to the Max

For Teachers 9th - 12th
Students experiment with the angle that yields the greatest distance of water at constant pressure.  In this experiment with the angle that yields the greatest distance of water at constant pressure instructional activity, students...
Lesson Plan
Curated OER

Properties of Parallelograms

For Teachers 9th - 12th Standards
High schoolers discover properties of parallelograms as they construct a parallelogram using Cabri Jr. They will measure angles and side lengths of their construction and determine the relationship between the diagonals of a...
Worksheet
Curated OER

Properties of Quadrilaterals

For Students 9th - 11th
In this properties of quadrilaterals activity, students use the properties of quadrilaterals to find the perimeter, angle measurement or length of a missing side of a given polygon. Examples and explanations of the properties are...
Worksheet
Curated OER

Easy Worksheet: Classify the Triangle

For Students 9th - 12th
In this classify the triangle worksheet, students solve 6 short answer problems. Students identify the type of triangle being described according to its angle measures and side lengths.
Lesson Plan
Curated OER

Super Gelatin

For Teachers 9th - 12th
Students measure angles of refraction as the light travels through gelatin.  For this experimental lesson students complete a refraction lab and plot their data.
Worksheet
Curated OER

Properties of Parallelograms

For Students 10th
For this geometry worksheet, 10th graders apply the properties of parallelograms to find the indicated angle measure or segment length. The two page worksheet contains twenty-two problems. Answers are included.
Worksheet
Curated OER

Latitude and Longitude

For Students 5th - 6th
In this latitude and longitude instructional activity, learners complete 4 activities to demonstrate understanding. Students use a protractor to measure angles on a map of the earth. Learners fill out a latitude and longitude chart after...
Worksheet
Curated OER

Trapezoids

For Students 9th - 12th
In this trapezoids worksheet, student solve 46 fill in the blank problems. Students find unknown side lengths and angle measures of an isosceles trapezoid and a rhombus.
Lesson Plan
Curated OER

Biography of a Star: Our Sun's Birth, Life, and Death

For Teachers 9th - 12th
Students examine how astronomers use parallax to determine the distances of stars in the Sun's neighborhood. They construct a pinhole protractor, and measure angles and calculate distances.
Organizer
Curated OER

Quadrilaterals

For Students 5th - 6th
In this solving quadrilateral word problems learning exercise, students draw figures to identify quadrilaterals, use angles to find the ones missing, and explain classification. Students solve six problems.
Worksheet
Mt. San Antonio Collage

Properties of a Parallelogram

For Students 9th - 12th Standards
More than just a worksheet, the resource provides a thorough guide to navigate through the land of parallelograms. Filled with definitions and theorems, the resource supports learners through problems such as proofs and finding missing...
Worksheet
Curated OER

Sine, Cosine, and Tangent Ratios

For Students 11th
In this ratios worksheet, 11th graders solve and complete 8 various types of problems. First, they read each problems and draw a sketch for each. Then, students write a trigonometric ratio for each problem and round any decimal answers...
Lesson Plan
Curated OER

Geometry Journal: Isosceles Triangles

For Teachers 10th - 12th
In this isosceles triangles worksheet, students justify and determine the symmetry of an isosceles triangle. They explore the bisector of rectangles. This three-page worksheet contains two problems. Answers are listed on page three.
Worksheet
Curated OER

Classify Triangles

For Students 4th - 7th
Here is a classifying triangles practice worksheet in which learners sharpen their problem solving skills as they solve six story problems.
Worksheet
Curated OER

Proofs

For Students 8th - 11th
In this geometric proof worksheet, students compose 20 triangle congruency proofs. Students will decide if there is enough information in problems 1-6 to prove if any triangles are congruent. In problems 17 to 20, students use given...
Lesson Plan
Curated OER

Law of Sines

For Teachers 10th - 12th
In this Law of Sines worksheet, students describe, in their own words, when to use the law of sines. They give an example of a problem using the law of sines. This two-page worksheet contains one problem and a sample answer.
Lesson Plan
Curated OER

Similar Situations

For Teachers 3rd - 6th
Students explore intersecting lines. In this intersecting lines lesson, students investigate shapes consisting of parallel, perpendicular, and similar lines. Students investigate these lines in shapes around them.
Lesson Plan
Alabama Learning Exchange

Origami Geometry

For Teachers 2nd - 5th Standards
Origami is an excellent way to combine Japanese culture, art, and geometric shapes into one engaging instructional activity! Scholars begin by listening to the story Sadako and the Thousand Paper Cranes and learn the origin of...
Lesson Plan
Curated OER

Finding Perimeter and Area

For Teachers 3rd - 5th
Geometers find the perimeter and area of rectangles. They discuss the definitions and characteristics of rectangles and squares. In groups, they use yarn to discover the perimeter of squares and rectangles. They count cubes to explore...
Lesson Plan
Curated OER

Triangle Attributes and Measures

For Teachers 7th
Seventh graders explore the concept of triangles. In this triangles lesson, 7th graders sort triangles according to various attributes such as acute, obtuse, isosceles, or equilateral. Students find the area and perimeter of triangles.

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