Lesson Plan
Curated OER

Magnetic Fields and Bermuda Triangles

For Teachers 8th - 12th
Students map magnetic fields of a magnet using a compass and predict where fields cancel each other to create 'Bermuda Triangles'. In this magnetism lesson, students use a compass to map the magnetic field of a magnet. They explain how...
Worksheet
Curated OER

Triangle Fundamentals

For Students 8th - 12th
In this geometry worksheet, students observe a triangle marked with three angles and are given two measures to find the missing third measure. A second diagram is given with six angles. There are 20 questions.
Worksheet
Curated OER

Area of Triangles 1

For Students 10th
In this geometry worksheet, 10th graders solve problems involving area of a triangle.  The worksheet contains a combination of problems drawn on a grid and those with the dimensions labeled.  The two page worksheet contains...
Worksheet
Curated OER

Walking to Make a Triangle

For Students 9th - 12th
In this word problem instructional activity, high schoolers solve 1 multiple choice word problem.  Students determine the distance one must travel to complete a triangle.
Lesson Plan
1
1
Texas Instruments

Exploring the Binomial Theorem

For Teachers 9th - 12th Standards
A comprehensive lesson that explores and researches Pascal's triangle and relates its properties to the Binomial Theorem through a variety of lessons. Have the class practice expanding polynomials using the theorem. A few other formulas...
Lesson Plan
Curated OER

Basic Right Triangles

For Teachers 2nd - 4th
Elementary schoolers examine the attributes of triangles. In this triangle lesson, learners compare regular triangles and right triangles. They explore vertices and angles and investigate obtuse and acute angles. Pupils draw multiple...
Lesson Plan
Curated OER

Right Triangles

For Teachers 4th - 8th
Learners classify triangles and make connections regarding angle measurements and attributes of acute, right, and obtuse triangles. They listen to teacher define and explain triangles. Everyone imagines a place where a broken wing for a...
Lesson Plan
Curated OER

Right Triangles

For Teachers 7th - 8th
In this right triangles worksheet, students solve and complete 2 different types of problems. First, they take the case of an isosceles right triangle with a given leg and hypotenuse. Then, students find the sum of the squares of the...
Lesson Plan
Curated OER

Isosceles Triangle Theorem

For Teachers 8th - 9th
In this geometry worksheet, students differentiate between isosceles and regular triangles. They calculate the area and perimeter of the triangle. There are eleven questions with an answer key.
Worksheet
Curated OER

Isosceles Right Triangle

For Students 10th
In this isosceles right triangle worksheet, 10th graders solve and complete 5 different constructions of composition and decomposition. First, they make 4 congruent isosceles triangles with the model on the left. Then, students create...
Lesson Plan
Curated OER

Triangles: Triangle Inequalities

For Teachers 9th - 12th Standards
Using SketchPad on their calculators to construct triangles, students measure exterior angles and remote interior angles of their constructed triangle. Students develop the triangle inequality from observation and exploration with their...
Interactive
CK-12 Foundation

Identifying Sets of Pythagorean Triples: Matching Problem

For Students 8th - 12th Standards
What sets of whole numbers make up the measures of side lengths in right triangles? Pupils use an interactive triangle to learn about Pythagorean triples. Individuals find missing values in triples and learn more about Pythagorean...
Worksheet
Curated OER

Classifying Triangles

For Students 8th - 10th
In this classifying triangles learning exercise, students explore given lengths or angle measurements and then classify each triangle as isosceles, scalene or equilateral. They also determine if the triangle may be right, acute or...
Worksheet
Curated OER

Easy Worksheet: Right Triangles and Circles

For Students 9th - 12th
In this right triangles and circles worksheet, students solve 4 short answer problems. Students describe a right triangle formed by point on a circle and an angle measure.
Lesson Plan
Curated OER

Parallelograms and Triangles

For Teachers 8th - 11th
In this parallelogram and triangle worksheet, learners answer 10 word problems regarding the area and perimeter of triangles and the area of parallelograms.
Worksheet
Helping with Math

Geometry: Areas of Triangles

For Students 7th - 9th Standards
For this areas of triangles instructional activity, students observe given polygons. They determine the area of triangles, rectangles and compound figures. This one-page instructional activity contains 5 multi-step problems. This...
Worksheet
Curated OER

Isosceles Triangles

For Students 9th - 12th
In this geometry learning exercise, students set up equations to solve for the missing angle or side of an isosceles triangle. All the equations turn out to be linear and not quadratic. There are 15 questions. 
Worksheet
Curated OER

Glencoe - Proportions and Similar Triangles

For Students 9th - 12th
In this proportions and similar triangles learning exercise, high schoolers solve 14 multiple choice problems. Students find unknown sides of similar triangles using proportions. High schoolers multiply means and extremes to solve...
Lesson Plan
Curated OER

Triangle Puzzler

For Teachers 4th - 5th
In this math worksheet, students analyze a chart and identify the names of 9 types of triangles. Students also find as many kinds of triangles they can in a given figure.
Worksheet
Math Mammoth

Classify The Triangles

For Students 6th - 8th
In this math worksheet, learners measure all the angles in these triangles. They also calculate the sum of the angles and classify the triangles.
Worksheet
Curated OER

Geometry: Properties of Triangles

For Students 10th - 12th
In this properties of triangles worksheet, students use their knowledge of triangles to find determine angle measurement. They use geometric theorems to prove equal angles. This three-page worksheet contains 15 multi-step geometry...
Assessment
1
1
Balanced Assessment

Mirror, Mirror II

For Students 9th - 12th Standards
Apply the concept of similar triangles to design a space in a room. Scholars use similar triangles to determine how a spotlight reflects from a mirror. After drawing the path of the spotlight, individuals find the smallest possible width...
Lesson Plan
Curated OER

Transforming Triangles

For Teachers 6th
Sixth graders graph translations (slides) and reflections (flips) on a coordinate plane. They visualize and identify geometric shapes after applying transformations on a coordinate plane. Finally, 6th graders write a paragraph telling...
Worksheet
Math Mammoth

Area Problems/ Triangles

For Students 6th - 8th
In this math activity, students find the area of each triangle that is described in the word problem. They calculate the area through using the formula of 1/2 Base X Height.

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