Activity
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Baylor College

#### Global Atmospheric Change: The Math Link

For Teachers K - 5th Standards
Change up the classroom atmosphere with this interdisciplinary resource. Following along with the children's book Mr. Slaptail's Curious Contraption, these math worksheets provide practice with a wide range of topics including simple...
Lesson Plan
Illustrative Mathematics

#### Finding an Unknown Angle

For Teachers 4th - 6th Standards
Teach your class how to apply their knowledge of geometry as they explore the unknown. In order to find an unknown angle, students must understand that rectangles have four interior right angles, that right angles have 90 degrees, and...
Lesson Plan
Illustrative Mathematics

#### Are These Right?

For Teachers 3rd - 5th Standards
Is that a right triangle or a wrong triangle? Young mathematicians look at eleven different shapes and use a measuring tool of their choice to determine which triangles have right angles. Consider cutting out sets of the shapes to...
Worksheet
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DK Publishing

#### Using a Protractor

For Students 3rd - 5th Standards
Learn how to measure acute, right, and obtuse angles with a protractor. After reviewing the way the protractor works, fourth graders measure nine angles on their own. For extra practice, have them measure different angles in their...
Worksheet
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Curated OER

#### Properties of Polygons, Parallel Sides, and Right Angles

For Students 2nd - 4th Standards
Have fun with shapes! Third graders read a set of instructions and circle the shape in the description. They work on recognizing parallel sides and right sides. Use this resource as homework after your geometry lesson.
Lesson Plan
Curated OER

#### Angles

For Teachers 3rd - 5th
Learners identify obtuse and acute angles in comparsion to a right angle. They identify obtuse, acute, and right angles. Pupils use "Shape Measure" to construct obtuse, acute, and right angles. They review line segements to locate right...
PPT
Curated OER

#### Year 5 Unit 2b

For Teachers 4th - 5th
This slide-show is packed with information relating to a variety of mathematical concepts. Intended as an accompaniment to a full unit, this resource provides definitions, explanations, and opportunities for learners to practice their...
Lesson Plan
Curated OER

#### "Polly"gon Pockets

For Teachers 3rd - 5th Standards
Explore polygons with your elementary learners. Divide the class in 12 to configure the polygon puzzle before them. They list the attributes of each type of polygon they see, and if there's time, they jump on the interactive website...
Worksheet
Curated OER

#### Revise Properties of 3-D Shapes

For Students 5th - 6th
In this properties of 3-D shapes worksheet, students identify shape, faces, edges, vertices, and right angles. In this fill in the blank worksheet, students answer thirty-six problems.
Lesson Plan
Curated OER

#### Flying with Pythagoras

For Teachers 7th - 10th
A lengthy narrative about Pythagoras and his students precedes an activity in which your young mathematicians practice using the Pythagorean theorem to solve three problems about flight and distance. Answers are provided.
Worksheet
Curated OER

#### Making an Angle Eater

For Students 3rd
Third graders create angle eaters where they use circles with cut outs to identify right, obtuse, and acute angles. Students complete 1 angle eater.
PPT
Curated OER

#### Direction and Angle: Positions and Directions

For Teachers 3rd - 4th
This is an interesting mix of concepts. Half of this presentation provides double-digit addition and subtraction practice and the other half has students discuss cardinal directions and right angles. Use these together, or use them on...
Lesson Plan
Curated OER

For Teachers 4th - 5th Standards
Fourth and fifth graders work in pairs  explore quadrilaterals. In this problem-solving lesson, learners participate in hands-on activities that require them to identify, describe, compare, and classify quadrilaterals. This is meant to...
Worksheet
Curated OER

#### Tell Me! Geometry

For Students 4th - 5th
In this geometry and measurement worksheet, students solve 20 problems pertaining to parallel lines, geometric figures, right angles and simple measurements.
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
Curated OER

#### Angles - Digger and the Gang

For Teachers 4th - 6th
Learners explore angle estimation and measurement. In this angle lesson, students define obtuse, acute, and right angles, and practice measuring angles using a protractor. Learners participate in an online angle estimation activity.
Lesson Plan
Curated OER

#### Perimeter

For Teachers 3rd - 5th
Students study about perimeter and the units used to measure perimeter using a variety of materials including their hands, feet, rulers, and computer applets. They understand such attributes as length, area, weight, volume, and size of...
Worksheet
Curated OER

#### Countdown Challenge: Right Angles

For Students 6th - 8th
In this right angle worksheet, students observe a map of the United States of America. They indicate all right angles on the map by using a right angle symbol. Students list the names of the states and identify the number of right angles...
Lesson Plan
Curated OER

#### Basic Trigonometric Ratios

For Teachers 11th - 12th
In this trigonometric ratio worksheet, students determine the length of a side of a right triangle, or the measurement of angles using trigonometric ratios. This one-page worksheet contains 24 problems. Answers are provided at the bottom...
Lesson Plan
Curated OER

#### Identifying Angles

For Teachers 3rd
Third graders analyze angles and determine if they are acute, right, or obtuse. In this angles lesson, 3rd graders study the definition and characteristics of each angle. Students then do a worksheet to identify the name of the angle.
Lesson Plan
Curated OER

#### Symmetry in Paper Airplanes

For Teachers 5th - 8th
Students explore symmetry.  In this geometry and scientific inquiry lesson, students design paper airplanes with middle line symmetry, as well as right, obtuse, and acute angles.  Students measure the plane's angles using a protractor,...
Lesson Plan
Curated OER

#### Travel Triangles

For Teachers 8th - 11th
Learners demonstrate and understanding of the three types of angles using triangles and quadrilaterals. In this angles lesson plan, students learn about acute, obtuse and right angles. They use cut-outs to find the areas of triangles and...
Lesson Plan
Curated OER

#### Pythagorean Theorem

For Teachers 8th
Eighth graders draw right triangles and identify the parts of a right triangle: right angle, interior and exterior angles, hypotenuse and legs. They predict and identify any relationships that exist between the sides of a right...
Lesson Plan
Curated OER

#### Geometric Angles

For Teachers 8th - 10th
Students explore angles and their use in Geometry. Students investigate three different kinds of angles: obtuse, acute, and right angles through an online activity. They identify pairs of angles with special relationships: vertical,...