## Indirect Measurement - Using Similar Triangles

Related Topics: More Lessons for Grade 8 Math Math Worksheets

Examples, solutions, videos, worksheets, stories, and songs to help Grade 8 students learn about indirect measurement (using similar triangles).

Indirect Measurement: Examples How to apply your knowledge of similar triangles and proportions to model real-life situations and to find unknown measurements indirectly. Example:

- A tree outside Ellie’s building casts a 125 foot shadow. At the same time of day, Ellie casts a 5.5 foot shadow. If Ellie is 4 feet 10 inches tall, how tall is the tree?
- Cameron is 5 ft tall and casts a 12 ft shadow. At the same time of day, a nearby building casts a 78 ft shadow. How tall is the building?
- The Empire State Building is 1250 ft. tall. At 3:00, Pablo stands next to the building and has an 8 ft. shadow. If he is 6 ft tall, how long is the Empire State Building’s shadow at 3:00?

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## High school geometry

Course: high school geometry > unit 4.

- Intro to triangle similarity
- Triangle similarity postulates/criteria
- Angle-angle triangle similarity criterion

## Determine similar triangles: Angles

- Determine similar triangles: SSS
- Determining similar triangles
- Prove triangle similarity
- Triangle similarity review
- (Choice A) △ Q R S only A △ Q R S only
- (Choice B) △ T U V only B △ T U V only
- (Choice C) Both C Both
- (Choice D) Neither D Neither

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Lesson 5 Homework Practice DATE PERIOD I Similar Triangles and Indirect Measurement In Exercises 1-4, the triangles are similar. Write a proportion and solve the problem. 1. TREES How tall is Yori? tree (as) 2-0 25 G.â5 h ft z.ð as las- 3. LAKE How deep is the water 31.5 feet from the shore? 6ft B d ft 2. 4. TREASURE HUNT How far is it from the

Indirect Measurement Using Similar Triangles Indirect measurement is a method of using proportions to find an unknown length or distance in similar figures. Two common ways to achieve indirect measurement involve (1) using a mirror on the ground and (2) using shadow lengths and find an object's height.

For which of the following would similar triangles and trigonometry be useful for measuring? The width of a wide river. If the shadow of a tree is 14 m long and the shadow of a person who is 1.8 m tall is 4 m long, how tall is the tree? Which of the following proportions could not be used to solve the problem? ¹⁴⁄₁.₈ = ˣ⁄₄.

similar. Explain. 2. The pair of polygons is similar. Find the missing side measure. 3. TEST PRACTICE A greeting card is 8 inches by 6 inches, but it will have to be cut to fit in an envelope. The scale factor from the original card to the smaller card is 5:4. Find the dimensions of Use with Lesson 5 Standard 8.G.4 Glencoe Math, Course 3 the ...

Indirect Measurement: Indirect measurement is the process of using the characteristics of similar triangles to measure distances. Scale Factor: A scale factor is a ratio of the scale to the original or actual dimension written in simplest form. Similar: Two figures are similar if they have the same shape, but not necessarily the same size.

Solve similar triangles (basic) VA.Math: 7.5. Google Classroom. You might need: Calculator. Triangle A B C is similar to triangle X Y Z . Solve for t . t =. A C B 19.5 12 13.5 X Z Y t 4 4.5.

Measurement - 95 - Session 5 In the following example, triangle ABC is similar to triangle DEF. To find the length of x, you set up a proportion as shown below. (Notice that x is perpendicular to side a, which will help us with calculations.) When we use similar triangles to measure indirectly, we usually collect some measurements from a triangle that

Wyzant is IXL's tutoring network and features thousands of tutors who can help with math, writing, science, languages, music, hobbies, and almost anything else you can imagine. For all ages, children to adults. Improve your math knowledge with free questions in "Similar triangles and indirect measurement" and thousands of other math skills.

Practice Solving Similar Triangles with Indirect Measurement & Triangles Given with practice problems and explanations. Get instant feedback, extra help and step-by-step explanations.

Course: 1st grade > Unit 3. Lesson 1: Length and size. Ordering by length. Order by length. Indirect measurement. Measuring length: golden statue. Measure lengths 1.

As an example: 14/20 = x/100. Then multiply the numerator of the first fraction by the denominator of the second fraction: 1400 =. Then, multiply the denominator of the first fraction by the numerator of the second, and you will get: 1400 = 20x. Solve by dividing both sides by 20. The answer is 70.

Solving Similar Triangles with Indirect Measurement Word Problems: Example Problem 1 A 20 ft. tree is casting a shadow that is 12 ft. long. A person standing nearby casts a 3 ft. shadow.

Lesson 11.3 Indirect Measurement with Similar Triangles. Page 75: Lesson 11.4 Corresponding Parts of Similar Triangles. ... Lesson 12.5 Problem Solving with Trigonometry. Exercise 1. Exercise 2. Exercise 3. Exercise 4. Exercise 5. ... With Expert Solutions for thousands of practice problems, you can take the guesswork out of studying and move ...

Indirect Measurement • You can use similar triangles and proportions to find lengths that you cannot directly measure in the real world. ... Set up a proportion for the similar triangles. 17h = 6 • 51 Write the cross products. h = 18 Simplify. Divide each side by 17. 17h 17 6 • 51 17 = The height of the flagpole is 18 ft.

PROBLEM SOLVING SKILLS: INDIRECT MEASUREMENT. ... Properties of similar triangles can be used to calculate. some indirect measurements. Definitions. Using proportions to find a measurement is called indirect ... Lesson Example. George is 5 1/2 feet tall. His shadow is 22 inches long at the same time that a. tree has a shadow that is 120 inches ...

Solving Similar Triangles with Indirect Measurement & Triangles Given. Step 1: Identify the sides and/or angles of the given triangle. Step 2: Calculate the third angle from the equation, ∠ A ...

Problem Solving 8-4 Similar Figures LESSON 1. The map at right shows the ... Practice A 8-5 Indirect Measurement LESSON Write the correct answer. 1. Use similar triangles to find the height of the lamppost. 2. Use similar triangles to find the height of the man. 8 ft 4 ft h 12 ft h " 6 feet h 20 ft 5 ft 10 ft h " 10 feet 3.

Practice C 8-5 Indirect Measurement LESSON 1. Use similar triangles to find the height of the tower. 2.Use similar triangles to find the height of the man. h 224.1 ft 44.82 ft 27 ft h! 5.4 feet h 48 yd 10 ft 6.2 ft h! 29.76 yd 3. On a sunny day, a 6.5-foot-tall ladder casts a shadow that is 19.5 feet long. A man who is 6.2 feet tall is painting

The heights of the two elephants, S and T, are 2.5 m and 2.8 m, respectively. If elephant S produces a 3 m length shadow, find the length of the shadow is produced by elephant T. Answers:

Problem Solving. Page 444: Reflect. Exercise 1. Exercise 2. Exercise 3. Exercise 4. Exercise 5. Exercise 6. ... Similar Triangles and Indirect Measurement. Section 7-6: Sole and Similar Triangles. Section 7-7: ... With Expert Solutions for thousands of practice problems, you can take the guesswork out of studying and move forward with confidence.

Indirect Measurement Notes and Practices gives a brief definition and students will practice the process of indirect measurement through a series of examples with and without given diagrams. A two-page practice activity is also provided.This resource is designed to accompany standard G.GSR.5 from Unit 5 of Geometry: Concepts and Connections, the Georgia course being rolled out in the fall of 2023.

NAME DATE PERIOD Lesson 5 Skills Practice Similar Triangles and Indirect Measurement In Exercises 1 6 the triangles are similar. Write a proportion and solve the problem* 1. HEIGHT How tall is Becky 2. FLAGS How tall is the flagpole h ft 3 ft 7 ft 6 2 ft 4 ft 9 ft 31 2 ft 3. BEACH How deep is the water 50 feet from shore 4.

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