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Interactive
Curated OER

Area of Shaded Region (rectangles and triangles)

For Students 9th - 12th
In this online math worksheet, high schoolers determine the area of shaded regions within rectangles and triangles. This excellent resource allows the students to check their answers, and to get "hints" should they run into difficulties....
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Lesson Plan
Curated OER

Types of Sentences

For Teachers 4th
Fourth graders identify and write different types of sentences. In this sentences lesson plan, 4th graders use pictures and animation to write declarative, interrogative, imperative, and exclamatory sentences.
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Lesson Plan
Houghton Mifflin Harcourt

Developing the Concept: Triangles and Quadrilaterals

For Teachers 5th - 7th Standards
Exact narrative and examples make this lesson on polygons easy to implement. Through it, your class will learn how to use a protractor and ruler to construct triangles and quadrilaterals according to your directions. Your class will be...
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Worksheet
Curated OER

Recognize and Draw Shapes

For Students K - 1st
What type of shape is this? Learners practice identifying shape attributes as they name a parallelogram and an oval and count the sides of a cube and a triangle. There are multiple-choice answers for the shape-name questions, so...
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Worksheet
Curated OER

Recognize and Draw Shapes

For Students 1st - 2nd
Each of these 10 shapes comes with a question for learners to answer as they analyze its attributes. They examine the following shapes: hexagon, trapezoid, pentagon, circle, diamond, parallelogram, rectangle, triangle, cube, and oval....
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Lesson Plan
Curated OER

Pythagorean Theorem

For Teachers 7th - 10th
In this measurement lesson, learners examine the Pythagorean Theorem, perimeter, and areas of right triangles. They record their measurements and research their findings on a grid.
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Worksheet
Curated OER

Area

For Students 5th - 7th
Learners solve and complete four various types of problems. First, they show on the diagram why the area of a triangle is given by a formula. Then, pupils find the area of each triangle and parallelogram illustrated, They also circle the...
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Worksheet
Centre for Education in Mathematics and Computing

Roots and the Pythagorean Theorem

For Students 7th - 9th Standards
In this roots and the Pythagorean Theorem worksheet, learners solve 15 different types of problems related to square roots and applying the Pythagorean Theorem. They first determine the square root of each number and then, the cube root....
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Worksheet
Curated OER

8th Grade Math Worksheet

For Students 8th
In this linear equations instructional activity, 8th graders solve 10 different problems that include various types of linear equations. First, they write the distance between Venus and the Sun in scientific notation. Then, students...
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Worksheet
Curated OER

Identify Geometric Shapes

For Students 5th - 6th
Practice identifying quadrilaterals, triangles, and closed curves with this worksheet. Given a series of shapes, learners check boxes next to each shape to indicate whether it under the correct label. Possible shape types are...
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Lesson Plan
Curated OER

Investigation Area of Geometric Shapes

For Teachers 4th
Fourth graders use triangle paper to design patterns using geometric figures and find the areas of those figures by counting units. Students are assessed by determining which figure has the greatest area and explaining their reasoning.
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Worksheet
Curated OER

Label the Shape Worksheet

For Students K
Kindergartners demonstrate their ability to identify seven different shapes by labeling each of the 28 examples on the worksheet. Learners must be able to identify rectangles, diamonds, squares, ovals, triangles, circles, and pentagons.
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Worksheet
Curated OER

Understand Categories of Shapes

For Students K - 1st
This colorful set of shapes and figures is the data set learners need to fill out an extensive table. For each of 11 types of shapes or figures they record the quantity and how many corners and sides each has. This becomes more difficult...
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Worksheet
Curated OER

Triangle Challenge

For Students 7th - 8th
In this triangles worksheet, students identify and name 3 different types of triangles. First, they determine the number of right triangles in the figure shown on the sheet. Then, students determine the number of equilateral triangles...
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Unit Plan
Mathematics Vision Project

Geometric Figures

For Teachers 10th - 12th Standards
Logical thinking is at the forefront of this jam-packed lesson, with young mathematicians not only investigating geometric concepts but also how they "know what they know". Through each activity and worksheet, learners wrestle with...
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Lesson Plan
EngageNY

Similar Triangles in Circle-Secant (or Circle-Secant-Tangent) Diagrams

For Teachers 9th - 12th Standards
First angle measures, now segment lengths. High schoolers first measure segments formed by secants that intersect interior to a circle, secants that intersect exterior to a circle, and a secant and a tangent that intersect exterior to a...
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Activity
Under the Dome

Triangle Mystery ...

For Students 6th Standards
Build a pyramid based on sums. Individuals watch a video of a computer program that creates a pyramid of numbers based upon a starting number. The scholars develop a hypothesis on how the number trick works and share their thoughts on...
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Worksheet
PreKinders

Christmas Tree Pattern Block Mat

For Students Pre-K - 1st
Put the tree back in geometry! Explore shapes and celebrate Christmas while using pentagon, square, and triangle pattern blocks to create a Christmas tree.
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Worksheet
Curated OER

Identify Types of Triangles

For Students 4th - 6th
In this triangle instructional activity, learners identify triangles as either equilateral, scalene or isosceles. A reference web site is given for additional activities.
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Lesson Plan
Houghton Mifflin Harcourt

Introducing the Concept: Triangles and Quadrilaterals

For Teachers 5th - 7th Standards
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...
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Lesson Plan
Curated OER

Triangles and Things

For Teachers K - 2nd Standards
Young learners listen to the story book The Greedy Triangle as the teacher introduces new polygon shapes. They use geometric stencils to trace a quadrilateral, a pentagon, a hexagon, and an octogon onto a foldable notepad. They identify...
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Worksheet
Curated OER

Identifying Types of Triangles

For Students 5th - 6th
In this triangle learning exercise, learners check the appropriate label for triangles: right, acute, obtuse, scalene, isosceles or equilateral. A reference web site is given for additional activities.
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Interactive
Curated OER

Angles in a Triangle

For Students 10th
In this geometry learning exercise, 10th graders determine the measure or measures of the missing angle(s) in a triangle. The one page interactive learning exercise contains four questions. Answers and hints are included. 
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Worksheet
Curated OER

Interior and Exterior Angles

For Students 10th
In this interior and exterior angles worksheet, 10th graders solve 10 different problems that include determining the interior and exterior of various triangles. They determine the measure of an exterior angle and then they determining...

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