Worksheet
Curated OER

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
Curated OER

Triangle Inequalities

For Students 10th
For this triangle inequalities worksheet, 10th graders solve 10 different problems that include various types of triangles. First, they determine which side is the longest side of a triangle with given the exterior angle measurement....
Worksheet
Curated OER

Congruent Triangles

For Students 10th
In this congruent triangles worksheet, 10th graders solve and complete 10 different problems that involve various congruent triangles. First, they determine the length of the third side given the other two. Then, students determine the...
Worksheet
Curated OER

Value of Triangles

For Students 9th - 10th
In this geometry activity, students identify the missing sides and angles of triangles. They find the midsegment of each triangle. There are nine questions with an answer key.
Worksheet
Curated OER

Triangles

For Students 10th
In this triangles worksheet, 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...
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....
Lesson Plan
Curated OER

Law of Sines

For Teachers 9th - 12th
Pupils identify the ratios of a right triangle. In this calculus lesson, students use the law of sines to solve problems involving non-right triangles. They identify the different parts of a triangle.
Worksheet
Curated OER

Reflection in a Line

For Students 10th
For this reflection of a line worksheet, 10th graders identify 10 different reflections of lines as stated in each. First, they determine the image of a point under a reflection across the x-axis. Then, students find x, y, and z of a...
Lesson Plan
Curated OER

Pythagorean Theorem

For Teachers 7th - 8th
Students discover the Pythagorean Theorem.  In this discovering the Pythagorean Theorem lesson, students measure the lengths of various triangles to the nearest centimeter. Students record their measurements in a table. ...
Lesson Plan
Curated OER

Special Segments in Triangles

For Teachers 9th - 12th Standards
Students identify important properties of triangles. In this geometry lesson, students differentiate between medians, bisectors and altitudes in a triangle. They identify the properties of these important segments.
Worksheet
Math Mammoth

Angles in a Triangle 2

For Students 6th - 8th Standards
Youngsters draw specified angles when given measurements of other angles and discover traits of angles in similar triangles. This one-page worksheet contains six multi-step problems.
Lesson Plan
Key Curriculum Press

Triangle Inequalities

For Teachers 8th - 11th Standards
Properties about triangles are explored in this lesson. Geometers make conjectures about the length of a triangle's sides, the length of the angles in relation to the length of the sides, and the measure of the exterior angles of a...
Lesson Plan
Curated OER

Reflecting a Triangle in the Coordinate Plane

For Teachers 9th - 12th Standards
Learners explore geometric concepts using technology. They manipulate the TI to find important math topics. This activity requires a TI-84 or higher.
Worksheet
Curated OER

Perimeter of Triangle Worksheet

For Students 10th
In this geometry worksheet, 10th graders are given the name and sides of a triangle and are asked to find the perimeter using the formula for the perimeter. There are 5 questions with an answer key.
Worksheet
Curated OER

Trigonometry

For Students 10th - 12th
In this right triangles worksheet, students use trigonometric ratios to determine the length of a side of a triangle or a missing angle measurement.  This two-page worksheet contains 20 problems.
Worksheet
Curated OER

Reflections

For Students 10th
In this reflections activity, 10th graders solve and complete 34 different problems that include determining various reflections. First, they trace the figure and draw its reflection in each line. Then, 10th graders use the diagram shown...
Worksheet
Curated OER

Section 8-6: Solving Problems Using Trigonometric Ratios

For Students 9th - 12th
For this trigonometric ratios worksheet, high schoolers solve 20 short answer and multiple choice problems.  Students use trigonometric ratios, the angle of depression, and angle of elevation to find missing side lengths of angles...
Handout
Lockport City School District

Reasons for Geometric Statement/Reason Proofs

For Students 8th - 11th Standards
Stuck trying to remember the formal language of a geometric proof? Never fear, this handout has them all ready to go. The reasons are sectioned by topic so this handy guide is ready when you are to tackle those two column proofs. 
Lesson Plan
Mathalicious

Out of Left Field

For Teachers 9th - 12th Standards
A baseball trajectory and a parabola seem to make the best pair in real-world quadratic applications. Here is a current baseball resource with questions, discussions, and explorations regarding a quadratic function and home run...
Worksheet
Curated OER

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.
Lesson Plan
Curated OER

Pasta Triangles - A Triangle Inequality Activity

For Teachers 6th - 8th
Students explore, examine and experiment with pasta sticks to discover the triangle inequality principle. They assess if any three lines or segments fit together to form a triangle. Each student also completes a Triangle Recording Chart...
Lesson Plan
Curated OER

Length of an Arc

For Teachers 11th - 12th
Students compute the length of an arc and each hypotenuse in the give figure, adding them up in the end. They then develop the formula for the arc length with respect to the x-axis and the y-axis. Students also develop a formula for the...
Worksheet
Curated OER

Parts of a Group

For Students 2nd - 4th
In this parts of a group set of worksheet, learners determine how many shapes are shaded in sets and writ the fraction for each. Sheets are set up 8 problems per page, 5 pages plus answers.
Worksheet
Curated OER

Equation of a Line

For Students 9th
In this equation of a line worksheet, 9th graders solve and complete 7 different problems. First, they find all values of the constant k, if the line contains the given points. Then, students write an equation of the line which passes...

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