### We found 87 resources with the keyterm right triangles

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Lesson Planet

#### SAT Prep: Test 1 Section 9 Part 3

For Students 9th - 12th
If it takes a long time to complete the problems on the math SAT, it doesn't matter if they are correct - the problems that are left over will count against the student's score. Sal takes care to show quicker ways to complete problems...
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#### CAHSEE Practice: Problems 38-42

For Students 9th - 10th
Sal shows your students how to thoroughly and effectively read and solve math problems on the CAHSEE (and other standardized tests) in this engaging video. From masters of geometry to students who struggle with basic math skills, these...
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#### The Pythagorean Theorem

For Teachers 7th - 9th Standards
What special relationship exists among the sides of a right triangle? Explore this relationship using a computer applet, cut-and-paste activity, and video tutorial to develop the Pythagorean Theorem and its significance to right triangles.
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#### Finding the Area of an Equilateral Triangle

For Teachers 9th - 11th Standards
The problem seems simple: find the area of the equilateral triangle whose sides are each length 1. In fact, this same problem is solved in 8th grade, addressing a different Common Core standard, using the formula for area of a triangle...
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#### Learning Unit: The Pythagorean Theorem

For Teachers 8th - 10th
Middle and high schoolers research the life of Pythagoras and the Pythagorean theorem. They write a short biography of Pythagoras and learn to apply the theorem in their study of right triangles.
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#### Principles of Square Roots Lesson Plan

For Teachers 8th - 11th
Middle and high schoolers investigate all the different places in math that square root is present. In this geometry lesson, pupils discuss square roots as it relates to a right triangle and construction. They go over altitude, rise,...
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#### Investigating Properties of Lines in the Plane

For Teachers 8th - 9th
Practice the properties of lines in the coordinate plane. Young mathematicians use Cabri on their graphing calculator to determine the slope ratios. They use the change in y-coordinates/change in x-coordinates. Additionally, they find...
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#### Pythagorean Theorem

For Teachers 7th - 10th
For 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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#### Acute Triangles

For Teachers 4th - 8th
Learners study acute triangles. They measure angles using a protractor, then classify the triangles as either right, obtuse, or acute. Everyone creates a design for a Navajo rug using only acute triangles.
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#### Classify Triangles - English Learners 16.5

For Students 4th - 5th
For this classifying triangles worksheet, learners solve four multiple choice problems where they classify triangles as scalene, right, isosceles, and equilateral.
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#### Right Triangles Trigonometry

For Teachers 9th - 12th
The class uses the computers to access GeoGebra Dynamic Worksheets to learn the basics about vectors. They will look at graphs and make computations to problem solve to find coordinates of vectors.
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#### 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...
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#### Easy Worksheet: Trigonometry

For Students 9th - 12th
For this trigonometry worksheet, high schoolers solve 4 short answer problems. Students find the sine, cosecant, secant or cotangent of an angle given a diagram of a right triangle with various measurements labeled.
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#### 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.
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#### Sin, Cos, and Tan of Right Triangles

For Teachers 9th - 12th
Students explore the sine, cosine, and tangent relationships of a right triangle.  In this sine, cosine, and tangent relationships of a right triangle lesson plan, students construct a right triangle.  Students develop the sine, cosine,...
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#### Ratios of Right Triangles

For Teachers 9th - 12th
Students find the angle measures of a right triangle given two side lengths.  In this finding the angle measures of a right triangle given two side lengths lesson plan, students record the ratio of a leg and hypotenuse of a right...
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#### What's the Trig?

For Teachers 9th - 12th Standards
Learners determine the trigonometric relationships within a triangle as they construct a right triangle on the Ti-89. They find the sine, cosine, and tangent of various angles of their triangle construction.
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#### Graphing in Circles

For Teachers 9th - 12th
High schoolers explore the concept of the unit circle.  In this unit circle lesson, students create a scatter plot of the sine, cosine, and tangent function using data from the x and y values on the unit circle.  High schoolers...
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#### Ratios in Right Triangles

For Teachers 9th - 12th Standards
Learners calculate the sides of right triangles in this trigonometric ratios lesson. They use Cabri Jr. software and TI-83 or TI-84 calculators to find the side lengths and their ratios to each other for various triangles. The provided...
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#### Circles

For Students 10th
For this circles worksheet, 10th graders solve and complete 13 various types of problems. First, they solve each set of triangles for the given variable. Then, students name a radius, a diameter, a tangent, a secant, a point of tangency,...
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#### Triangles

For Students 10th
In this triangles worksheet, 10th graders solve and complete 18 different problems that include identifying various triangles and their angles. First, they find the measure of an angle by setting up an equation using the given...
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#### The Pythagorean Theorem

For Teachers 9th - 10th
Students read the history of the Pythagorean Theorem online and answer questions. In this right triangle lesson plan, students read about the Babylonians and relate them to the origin of the Pythagorean Theorem. They solve problems by...
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#### Pythagorean Theorem Worksheet

For Students 9th - 12th
In this online math learning exercise, high schoolers use the Pythagorean Theorem to determine if given triangles are "right" triangles. This excellent resource allows the students to check their answers, and to get "hints" should they...
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#### The Pythagorean Theorem

For Teachers 9th - 10th
Pupils solve problems using the Pythagorean Theorem. In this geometry instructional activity, students find the correct ratios of each right triangle. They use the ratios to find missing angles and sides of triangles.