Similar Right Triangles Teacher Resources
Find Similar Right Triangles educational ideas and activities
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Proofs into Practice: The Pythagorean Theorem in the Real World
As an introduction to the lesson, learners verify the Pythagorean theorem with a hands-on proof. Then, pupils use the theorem to determine whether three side lengths could form a right triangle and choose one of two real-life situations to examine using the theorem.
8th - 12th Math 145 Views 213 Downloads CCSS: Designed
Applying the Pythagorean Theorem in a Mathematical Context
Participants who use this resource will apply the Pythagorean Theorem to show whether or not the shaded triangle inscribed in a rectangle is a right triangle. Once all of the sides on the shaded triangle are found, it is important that your class understands that the largest side may be the hypotenuse.
7th - 9th Math 35 Views 37 Downloads CCSS: Designed
Proving Slope Criteria for Parallel & Perpendicular Lines
This lesson launches with learners graphing the fourth vertex of a given rectangle, and finding the length and slope of one of its sides; and ends with learners writing a summary sheet for parallel and perpendicular lines. In between, collaborative groups rotate through four stations containing investigations using patty paper, graph paper, similar right triangles, distance formula, calculators, and geometers’ sketch pad.
7th - 11th Math 15 Views 8 Downloads CCSS: Designed
Mt. Whitney to Death Valley
This is an intriguing problem that brings together real-world data, technology, and mathematical problem solving. If visibility wasn't an issue, could you see from the highest point in the lower 48 states, Mt. Whitney, to the lowest point, Badwater Basin in Death Valley?
9th - 12th Math 19 Views 20 Downloads CCSS: Designed
Running on the Football Field
Make your class into Pythagorean theorem fanatics in no time. What a great resource to get your sports enthusiasts into the math game! Read the commentary so you can you can strategize how to apply the three math practices.
7th - 9th Math 42 Views 50 Downloads CCSS: Designed
Discovering AA Similarity Discovery
Your collaborative learners will create, analyze, and then discover the Angle-Angle criterion for similar triangles, as well as experience many of the math practice standards in a very well-organized lesson. They will explore the Angle-Angle criteria further by finding supporting examples that justify the rule holds true for all types of triangles.
9th - 11th Math 3 Views 3 Downloads
I Can Determine The Height Of A Rocket!
Maybe your class wouldn't be taking a field trip to a rocket launching site, but the ideas presented here could be used for a new by clock tower, tree, or telephone pole. Learners use trigonometric ratios to determine the heights of tall structures.
9th - 12th Math 4 Views 36 Downloads CCSS: Designed
Geometric Mean and Indirect Measurement
How do you measure the height of really tall building? Using similar triangles, and proportions, young geometers try to determine the height of a nearby building. Then they explore the concept of a geometric mean and how it relates to their measurements.
9th - 12th Math 3 Views 19 Downloads CCSS: Designed
Finding Slope of a Line from Graphs, Tables, and Ordered Pairs
Middle schoolers explore the concept of slope in numerous ways and start to look at simple linear equations. They describe the slope in a variety of ways such as the steepness of a line, developing a ratio, using graphs, using similar triangles, and through ordered pairs.
7th - 9th Math 58 Views 399 Downloads CCSS: Adaptable
Similar Parts Investigation
How tall is that flagpole? Your pupils might want to stand on each other's shoulders to answer this, but this activity is all about using the math knowledge they already possess. Using right triangle trigonometric ratios (SOH CAH TOA) and the Pythagorean theorem, young geometers solve real-world problems.
9th - 11th Math 16 Views 29 Downloads CCSS: Designed
Geometry Review Exam
In this geometry review worksheet, 10th graders solve and complete 100 various types of problems studied in geometry. First, they find the slope-intercept form of a line passing through two points and parallel to a given line. They also find the length of the leg of a right triangle.
10th Math 17 Views 17 Downloads
T Points from Directions
Here is a lesson plan that starts with having geometers translate points using compass directions into an accurate picture of the problem. Then they must use their knowledge of the Pythagorean theorem or similar triangles to solve. This makes a good small-group activity.
8th - 9th Math 3 Views 5 Downloads CCSS: Designed
Getting It Right! An Investigation of the Pythagorean Theorem
Learners construct a variety of right triangles using a right-angled set square, cutting corners from pieces of paper or cardboard, and using dynamic geometry software. They measure the sides of these various right triangles and record measurements in a spreadsheet.
6th - 8th Math 4 Views 75 Downloads
Eighth graders investigate direct and indirect measurement. In this eighth grade geometry and measurement lesson, 8th graders investigate a variety of methods for measuring the height of a tree. Students investigate and use the properties of similar triangles and special right triangles to solve application problems.
8th Math 3 Views 11 Downloads
Mathematics Within: Slope and Triangles
Learners discover a method for determining the slope of a line by creating and comparing similar triangles. They fold coordinate grids to make three similar triangles then measure the sides to compare the relationships between the triangles.
8th - 10th Math 30 Views 94 Downloads CCSS: Adaptable
Triangles Embedded in a Square
Looking for a nice activity that will help deepen your geometry learners' understanding of similar triangles? This activity maps a number of triangles embedded in a square on dot graph paper. Young geometers need to find as many different similar triangle pairs as they can find and justify their solutions.
9th - 12th Math 13 Views 7 Downloads CCSS: Designed
Middle schoolers construct a three-dimensional model of a city using both similar and congruent figures and geometric transformations. City must have at least ten buildings with each building labeled and may be constructed out of paper or modeling clay.
6th - 8th Math 43 Views 398 Downloads CCSS: Adaptable