Triangle Teacher Resources

Find Triangle lesson plans and worksheets
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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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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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Volume by Cross Sections

For Teachers 9th - 12th
Here is a lesson on volume, in which learners find the area of a square and a semicircle in the figure illustrates. They also find the area of a triangle given the base and draw a sketch to justify their answer. Pupils also determine the...
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What's in a Shape?

For Teachers 3rd - 5th
Students explore characteristics of shapes by making and using tangram sets. They discover how the tangram pieces are related to one another, and determine how many different combinations of the triangles, squares, and parallelograms in...
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For Students 10th
In this geometry worksheet, 10th graders solve problems that are based on the right triangle trigonometry and the special right triangles. The three page worksheet contains twelve questions.  Answers are not included. 
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Central Valley Math Project

For Teachers 7th - 8th
Middle schoolers study the Pythagorean Theorem. They describe what it means to square a number. Pupilsuse the Pythagorean Theorem to prove the sides of given triangles, and use geometric pieces of paper to create a right triangle and...
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Attributes of Shapes Guided Lesson Explanation

For Students 1st
Triangles, circles, and rectangles are featured in a colorful, one-page learning exercise that defines and illustrates these shapes. Read the explanations with your first graders and have them count the number of shapes in a given box....
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Drawing Positions for Shapes Worksheet

For Students K - 1st
Here are some fun preposition challenges for your pupils! They draw familiar pairs of shapes (triangle, circle, square, star, and diamond) based on relative location prompts. The terms include beside, above, behind, and below. There are...
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Polygon and Vectors

For Teachers 10th
Investigate vector sums for triangles and quadrilaterals. Explore the nine point circle, polygons and vectors. This lesson has a very thorough step by step teacher's guide for the TI - Voyage 200 with Cabri.
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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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Finding the Area and Perimeter of Polygons

For Teachers 7th
Seventh graders practice finding the area and perimeter of polygons. In this polygon area lesson, 7th graders brainstorm shapes and take a walk to locate shapes. Students record properties of shapes and use various shapes to make a...
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Geometry Chapter 7 Practice Test

For Students 10th
In this geometry worksheet, 10th graders review problems that review a variety to topics relating to right triangles, including, but not limited to the Pythagorean Theorem, simplifying radicals, special right triangles, and right...
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Cross-Fencing Pastures

For Teachers 6th - 8th
Explore the concept of area of shapes. Learners will find the area of triangles, squares, and rectangles using a geoboard application on the graphing calculator. They will also find the area of trapezoids and other irregular shapes by...
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A Toothpick Pattern Rule

For Students 6th - 7th
For this patterning worksheet, students identify and complete 2 different problems that include determining the number of toothpicks needed to form a given figure. First, they explain the rule that they use to determine the total number...
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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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Mathematics - Squares, Square Roots

For Teachers 7th - 9th
Looking for a quick introduction or review for area formulas?  Terminology and formulas for the area of squares, rectangles and triangles is presented. Connections with exponents and the Pythagorean Theorem are demonstrated.

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