Worksheet
Curated OER

Circles and Triangles: Sun

For Students K - 1st
In this coloring shape worksheet, students trace the circles and color them yellow. Kids trace the triangles and color them orange. Students then trace the circle and triangle at the bottom of the page.
Worksheet
Curated OER

Shapes and Color: Rectangles and Triangles

For Students Pre-K - 1st
In this shape and color instructional activity, students trace rectangles, coloring them pink, then trace circles, coloring them purple. Students then trace and color a set of 6 circles.
Worksheet
Curated OER

Shapes and Colors: Triangles and Ovals

For Students Pre-K - 1st
In this shape and color worksheet, students trace triangles coloring them brown, then trace ovals and color them pink. Students also trace and pictures of a ice cream cones made of triangles and ovals.
Worksheet
Curated OER

Tracy Triangle

For Students 1st
In this triangle worksheet, 1st graders study the picture of the triangle and then memorize the triangle song. Students practice drawing triangles in the provided space.
Worksheet
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Perimeter and Area of Triangles 2

For Students 5th
In this measurement learning exercise, 5th graders study the different triangles and then use the given measurements to find the perimeter and area for each.
Worksheet
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Calculating the Perimeter of a Triangle

For Students 5th
In this geometry worksheet, 5th graders read how to find the perimeter of a triangle. They use the P= S1+S2+S3 formula to find the perimeter of three triangles.
Worksheet
Curated OER

Shapes Matching Worksheet

For Students Pre-K - K
Using this worksheet, students practice identifying basic shapes, such as an oval, rectangle, triangle, and hexagon. This worksheet would be ideal for preschool or kindergarten students.
Worksheet
Curated OER

Creating Tessellations

For Students 10th
In this creating tessellations worksheet, 10th graders solve 2 word problems that include creating various tessellations. First, they explore the various techniques used to form tessellations, including triangles, quadrilaterals,...
Worksheet
Curated OER

Brain Teaser- How Many Triangles?

For Students 4th - 5th
In this geometry worksheet, students examine a picture that has many hidden triangles. Students count the triangles they discover and color the picture.
Lesson Plan
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Proposed Problems

For Teachers 11th - Higher Ed
In this math worksheet, students read the information about an isosceles triangle. The ratio of the lengths of two sides is equal. They determine the exact measures of its angles.
Lesson Plan
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Power Question 2

For Teachers 9th - 12th
In this math worksheet, students determine the locus of points, M, in plane ABC, such that KMAB=KMAC. They also draw the triangle ABC. Then determine the proof of the interior angles determining the identity of the equilateral triangle.
Worksheet
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Puzzling Shapes

For Students 2nd - 3rd
In this math activity, students count the number of rectangles and triangles they see in two drawings. Each figure has overlapping shapes.
Worksheet
Curated OER

Types of Triangles

For Students 4th - 5th
In this math worksheet, students classify the listed triangles and practice labeling them correctly. The definition of each type is necessary prerequisite knowledge.
Worksheet
Curated OER

Squares and Triangles

For Students K
In this squares and triangles worksheet, students trace five triangles and six squares, cut out each one and then place them together to make a variety of shapes.
Worksheet
Curated OER

Triangles Maze

For Students 1st - 2nd
In this math worksheet, students analyze the shape of a triangle to help Ollie Octopus find his way home. Students follow the path in the maze by only coloring the triangles.
Worksheet
Curated OER

Trace the Dancing Triangles

For Students K
In this triangle tracing worksheet, students will trace and color nine dancing triangles. The triangles have faces, arms, and legs.
Lesson Plan
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Number Triangles

For Teachers 1st - 2nd
In this elementary worksheet, students recognize the number order for the 12 triangles and they cut and glue them in the spaces around the circle.
Lesson Plan
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Space Shapes

For Teachers 1st
In this Geometry worksheet, 1st graders are challenged to color and identify different shapes using the theme of outer space and a rocket ship.
Lesson Plan
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Building With Triangles

For Teachers 3rd - 5th
Students participate in a unit on triangles. Through the unit they explore different way to make basic shapes using triangles. They also examine the basic properties of triangles and the relationships among basic geometrical shapes in...
Lesson Plan
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Tricky Triangles

For Teachers 3rd
Third graders engage in a lesson that is concerned with the playing of a Trick Triangle Game while focusing upon developing skills of addition, subtraction, multiplication, and division. They play the game and practice rounding of...
Lesson Plan
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Exploring Altitudes in Math

For Teachers 6th - 12th
Students draw and calculate altitudes. They draw the altitude of acute, right and obtuse triangles and calculate the altitude of a triangle using the Pythagorean theorem.
Lesson Plan
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In the Path of the Ancients: Unearthing Formulas for Area

For Teachers 9th - 12th
High schoolers apply the formulas for the area of parallelograms and triangles. Through guided practice, students discover the correct way to apply the formulas. Working in pairs, they write their own problems featuring the formulas.
Lesson Plan
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Exploring Centers of a Triangle: Part 1

For Teachers 9th - 11th
Students use problem solving skills, formal geometry, and The Geometer?s Sketchpad. They model and solve two real-world problems by constructing the in center and circumcenter of triangles.
Lesson Plan
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Using Polynomials To Find Perimeter

For Teachers 5th
Fifth graders engage in the solving of a real life application problem using the concept of calculating perimeter. They apply the operations of calculating with the polynomials for finding the perimeter of triangles,quadrilaterals, and...