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Lesson Plan
Curated OER

Types of Triangles

For Teachers 5th
Fifth graders explore the required functions of the Geometer's Sketchpad. Using the computer software, they construct similar triangles and identify them by angles and sides. Students classify triangles. Afterward, they complete problems...
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Worksheet
Curated OER

Right Triangles & Pythagorean Theorem

For Students 6th - 8th
In this math worksheet, students find the missing angles for the right triangles using the Pythagorean Theorem. Then they label the adjacent and opposite angles.
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Worksheet
Curated OER

Special Segments in Triangles

For Students 10th
In this special segments in triangles worksheet, 10th graders solve 6 various types of problems related to determining types of segments found in triangles. First, they find a segment if the line parallel is a median or an altitude....
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Worksheet
Curated OER

Triangles

For Students 10th
In this triangles worksheet, 10th graders solve and graph 8 different problems that include various transformations. First, they write a rule for the composition of a dilation of a scale factor. Then, students determine whether a graphed...
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Worksheet
Curated OER

Triangles

For Students 10th
In this triangles activity, 10th graders solve 10 different problems that include determining the measurement of various angles. First, they determine the area of a triangle illustrated on the sheet. Then, students use the picture to...
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Worksheet
Curated OER

Recognize Triangles

For Students Pre-K - 1st
In this shapes worksheet, students "colour" the triangles they find on the page. There are 10 shapes on the page and 4 of the mare triangles.
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Worksheet
Curated OER

Perimeter and Area of Triangles (B)

For Students 4th - 5th
In this geometry worksheet, students calculate the perimeter and area for each of 4 triangles using the given measurements. They work with measurements that are labeled in centimeters.
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Lesson Plan
Curated OER

Finding Remainders in Pascal's Triangle

For Teachers 5th - 6th
Students use clock arithmetic to find remainders. In this patterns in math lesson, students explore the relationship between clock arithmetic and remainders using a computer applet. Students also identify patterns in Pascal's triangle...
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Worksheet
Curated OER

Using Centimeters to Measure the Perimeter of Triangles

For Students 2nd
In this using centimeters to measure the perimeter of triangles worksheet, 2nd graders measure 6 triangles with a centimeter ruler and write the equation used to find the perimeter.
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Lesson Plan
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Pascal's Triangle

For Teachers 4th
Fourth graders explore the patterns of Pascal's Triangle. In this problem solving lesson, 4th graders identify the patterns in the triangle by using the elements and the rule of the triangle.
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Worksheet
Curated OER

Similar Polygons and Triangles Review

For Students 9th - 12th
In this similar polygons and triangles review activity, students solve 33 short answer problems. Students determine if two given polygons are similar. Students explain the type of similarity if they find two polygons to be similar.
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Lesson Plan
Curated OER

Right Triangles and The Pythagorean Theorem

For Teachers 8th - 9th
Students play a game to reinforce concepts of the Pythagorean Theorem. In this geometry lesson, students find the missing angle and lengths of a right triangle. They use properties of trigonometry about sine, cosine and tangent to solve...
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Worksheet
Curated OER

Easy Worksheet: Pascal's Triangle

For Students 9th - 12th
In this Pascal's Triangle learning exercise, high schoolers solve 4 short answer problems. Students shade multiples of a given number on Pascal's Triangle. High schoolers shade rows of Pascal's Triangle using mod eight and mod three.
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Lesson Plan
Curated OER

Patterns in Pascal's Triangle

For Teachers 4th
Fourth graders investigate the patterns found in Pascal's Triangle by identifying patterns on different items -- including the teachers clothing, a checker board, a quilt, and a spider web. The students access the referenced computer...
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Worksheet
Curated OER

Triangles Word Search

For Students 5th - 6th
In this word search worksheet, students locate 7 types of triangles. Triangles include isosceles, acute, equilateral, right, and obtuse.
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Worksheet
Curated OER

Geometry: Calculating Areas of Triangles

For Students 4th - 7th
In this geometry worksheet, students calculate the areas for each of the eight triangles shown and write their answers on the lines provided.
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Worksheet
Curated OER

Right Triangle Stuff

For Students 12th - Higher Ed
In this right triangle worksheet, students use trigonometric ratios to find the hypotenuse, right angle, opposite leg and angles. This one-page worksheet contains eight problems. Answers are provided at the bottom of the page.
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Worksheet
Curated OER

Triangles: Practice

For Students 4th - 6th
In this triangle worksheet, students classify triangles in 2 ways, write algebraic expressions to represent values then solve, and complete 1 test prep question. Houghton Mifflin text referenced.
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Worksheet
Curated OER

Triangles in Rectangle

For Students K - 2nd
In this geometric shapes worksheet, students cut out the triangles on the bottom of the worksheet and then paste them on the rectangle at the top of the worksheet.
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Worksheet
Curated OER

Triangles in Hexagon

For Students Pre-K - 1st
In this geometric shapes practice worksheet, students cut out 8 triangles from the bottom of the worksheet and paste them inside the hexagon shape on the top of the worksheet.
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Worksheet
Curated OER

Triangles in Octagon

For Students Pre-K - 1st
In this geometric shapes learning exercise, students cut out the 8 triangles on the bottom of the learning exercise and paste them to fit inside the octagon on the top of the learning exercise.
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Organizer
Curated OER

Triangle Worksheet: Cut, Construct and Think 1

For Students 6th
In this triangle activity, 6th graders draw and cut out a triangle, cut it into three pieces, then arrange the pieces to make new shapes.
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Worksheet
Curated OER

Proofs with Triangles

For Students 9th - 12th
In this geometry worksheet, high schoolers prove triangle congruence by making statements with reasons and concluding with the AAS or HL theorem. There are 2 proofs.
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Lesson Plan
Curated OER

Area of a Triangle

For Teachers 10th - 11th
Students solve the area of triangles. In this precalculus lesson, students are given two sides of a triangle and asked to calculate the area. They apply the law of sine and the side-angle-side area formula to solve.

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