Lesson Plan
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Designing a Fort

For Teachers 6th - 7th
Students explore the concept of right triangles. In this right triangle lesson, students construct a scale model of a tourist attraction similar to Fort Jefferson. Students research aerial photos of Fort Jefferson, then build their...
Lesson Plan
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Pythagoras's Theorem

For Teachers 5th - 6th
Students explore Pythagoras' Theorem. In this geometry lesson, students complete 4 pages of equations using Pythagoras's Theorem. Students complete 14 problems.
Worksheet
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Right Triangle

For Students 8th - 9th
In this right triangle worksheet, students find the length of sides of a right triangle. This one-page worksheet contains 1 problem.
Worksheet
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Right Triangle

For Students 8th - 9th
In this right triangle worksheet, students find the lengths of the sides of a triangle. This one-page worksheet contains 1 problem.
Worksheet
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Shapes: Triangles

For Students Pre-K - 1st
In this learning shapes worksheet, students practice their fine motor skills as they trace the triangle shape and trace the word "triangle."
Worksheet
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Shapes

For Students Pre-K - 1st
In this learning shapes worksheet, students practice their fine motor skills as they trace the square, triangle, rectangle, and circle shapes.
Worksheet
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Shapes and Colors

For Students K - 1st
In this shapes and colors worksheet, students analyze a picture of a house that is made with squares, rectangles and triangles. Students follow the directions to trace and color each of the geometric shapes they find in the picture.
Worksheet
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Triangles and Rectangles

For Students K - 1st
In this geometric shapes worksheet, students study five pictures of trees made out of triangles and rectangles. Students follow the directions to trace and color the shapes they find in the picture.
Worksheet
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Triangles and Ovals- Ice Cream Cones

For Students K - 1st
In this geometric shapes activity, students look for ovals and triangles in a picture of three multi-scoop ice cream cones. Students follow the directions to color each shape they find.
Worksheet
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Recognizing Triangles

For Students 1st - 2nd
In this triangles worksheet, students analyze 25 shapes in a full page collage. Some of the shapes have curved or jagged sides. Students circle all the triangles.
Worksheet
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Lines and Angles

For Students 6th - 8th
In this lines and angles worksheet, students identify parallel and perpendicular lines. They demonstrate the characteristics of a straight line. They determine missing angle measurements. This two-page worksheet contains 3 multi-step...
Lesson Plan
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Navy Sail Design

For Teachers 9th - 12th
High schoolers use the Pythagorean Theorem to explore sailboat design. In this Pythagorean Theorem lesson, two sides of a triangular sail are measured, and the theorem is used to calculate the third side. A worksheet, bulletin board...
Worksheet
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Grids

For Students 4th - 5th
In this geometry worksheet, students plot and label 8 sets of points and triangles on a grid using coordinate pairs. They use both positive and negative numbers.
Worksheet
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Tracing Triangles

For Students K - 3rd
In this tracing triangles worksheet, students trace the 4 triangles in each of the 3 rows and then draw some triangles on the back of the worksheet.
Lesson Plan
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Counting Triangles

For Teachers 6th
Sixth graders examine triangles in a figure. In this geometry lesson plan, 6th graders establish a method for counting triangles within a given figure. Students discover that the total number of triangles is the sum of all numbers counted.
Worksheet
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Triangle Coloring Sheet

For Students Pre-K - 1st
In this shape-themed coloring worksheet, students use crayons and markers to color the word triangle as well as the picture of a triangle.
Worksheet
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Triangles

For Students K
In this triangle worksheet, students focus on mastery of the shape. Students trace 3 large and 3 small triangles.
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Leveled Problem Solving Triangles

For Students 4th - 6th
In this triangles practice activity, students sharpen their problem solving skills as they solve 6 story problems.
Worksheet
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Chapter 8 Worksheet 2 Area of Polygons

For Students 7th - 12th
In this area of polygons worksheet, students compute the area of squares, rectangles, triangles, trapezoids and parallelograms. Given the area of polygons, students determine the missing dimension of the figure. This two-page worksheet...
Lesson Plan
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Triangles

For Teachers 7th
In this geometry worksheet, 7th graders identify the sides and angles of triangles, examine the Pythagorean Theorem, and complete 2 tables with square numbers. They apply the theorem to find the value of the hypotenuse of 2 triangles.
Worksheet
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Law of Sines and Cosines

For Students 10th - 12th
In this sine and cosine worksheet, students solve given triangles using the law of sines and cosines. They determine the area of triangles. This three-page worksheet contains 12 multi-step problems.
Worksheet
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Sort Triangles and Quadrilaterals

For Students 4th - 5th
In this triangle/quadrilateral worksheet, learners solve 6 problems that ask questions about lengths, parallel line and angles of quadrilaterals and triangles.
Worksheet
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Triangles

For Students 4th - 5th
In this triangle worksheet, students solve a set of 6 riddles involving the length of triangles and identifying types of triangles.
Lesson Plan
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Triangles

For Teachers 5th - 6th
Students discover the difference between triangles. In this triangle lesson plan, students discuss the different types of triangles, then draw the three different types of triangles. The teacher will draw, or model, how to draw the...