Warm up!. Scale drawings are enlarged or reduced drawings that are similar to an actual object or place. – The ratio of a distance in the drawing to the.

Slides:

Advertisements

Similar presentations

Quiz Use the properties of similar figures to answer 1 and 2:

Advertisements

Unit 6: Scale Factor and Measurement

RATIOS OF SCALE DRAWINGS. SCALE DRAWINGS SCALE DRAWINGS: A scale drawing is a drawing that represents a real object. The scale of the drawing is the ratio.

Problem of the Day 1) Find the Length of the missing side.

Similar Shapes and Scale Drawings

Scale Drawings & Scale Factor

Over Lesson 6–5 A.A B.B C.C D.D 5-Minute Check 1 Write a proportion. Then solve. 18 donuts in 3 boxes, 30 donuts in b boxes There are approximately 2.54.

9.1 Properties of Similar Figures Learning Objective: To use ratios and proportions to find measures of similar figures and use scale models to find dimensions.

Pre-Algebra 7-7 Scale Drawings HW: Page 370 #1-6 and #21-26.

Maps & Scale Drawings Pg in the textbook.

Scale Drawings & Scale Models

Scale Drawings & Proportions

Similar Shapes and Scale Drawings

Scale Drawings & Scale Factor

Scale Drawings and Scale Models

4-2(B) Scale Drawing.

7-4 Similar Figures Warm Up Warm Up Lesson Presentation Lesson Presentation Problem of the Day Problem of the Day Lesson Quizzes Lesson Quizzes.

Scale Drawing and Scale Models

Find Actual Measurements

All scale drawings must have a scale written on them. Scales are usually expressed as ratios. Normally for maps and buildings the ratio: Drawing length:

Target: Use proportions to solve problems involving similar figures.

I can use proportions to solve problems involving scale.

Scale Drawings & Models

Scale Drawing and Models

Extension 3.6 Proportions and Similar Figures A.What do you know about similar triangles and congruent triangles? B.Definitions 1.Similar triangles – have.

Chapter 7 Vocab Review. 1. Write the generic formula (proportion) for geometric mean (x) of two positive numbers a & b.

7-2 Similar Polygons. Similar Figures: have the same shape but not necessarily the same size. You can abbreviate is similar to with the symbol ~

 Two figures are similar if…  1.) Their corresponding angles are congruent  2.) The corresponding sides are PROPORTIONAL!!! 5 in A B C D 4 in 10 in.

Course Similar Figures 7-4 Similar Figures Course 1 Warm Up Warm Up Lesson Presentation Lesson Presentation Problem of the Day Problem of the Day.

Similar Figures and Scale Drawings

Course Similar Figures Warm Up Solve each proportion. b = y5y5 = p9p9 = m = 4. b = 10y = 8 p = 3 m = 52.

2.8 – Proportions & Similar Figures “I can solve proportions using scale factors.” “I can find missing side lengths of similar figures.”

Section 6.6 Scale Drawings

Scale Drawings.

Course Scale Drawings and Scale Models Warm Up Evaluate the following for x = x2. x Evaluate the following for x = x4. x

Similar Triangles Triangles that have the same shape but not necessarily the same size. Corresponding angles are congruent. Meaning they have the same.

Similar Shapes and Scale Drawings

4-6 Scale Drawings and Scale Models Lesson Scale Drawings and Scale Models Warm Up Write the two requirements needed for two figures to be SIMILAR:

Scale Drawings and Scale Models

Scale Drawing and Scale Models

7.5(A) Generalize the critical attributes of similarity, including

Learn to understand ratios and proportions in scale drawings

Similar Polygons.

7-2 Similar Polygons.

Scale Drawings & Models

7.G.1 Scale Drawings Review

Do now Homework: Lesson check 2-8 page 133

Scale Drawings & Scale Factor by Luther Allen, M.Ed

Maps and scale drawings are:

DO NOW Copy down your homework: 2-9 Lesson Check on page 141

= Divide each measure by the GCF, 3. drawing length actual length

Scale Drawings and Scale Models

A scale drawing is a drawing in which all parts of the drawing are reduced or enlarged by the same scale factor. A scale is a ratio that compares the measurements.

Scale Drawings & Scale Factor by Luther Allen, M.Ed

Scale Factor TeacherTwins©2014.

Scale Drawings & Scale Factor

Scale Drawings and Scale Models

ALGEBRA I - SECTION 2-8 (Proportions and Similar Figures)

Warm Up Problem of the Day Lesson Presentation Lesson Quizzes.

AIM 7-5: How can we use ratios to make indirect measurements?

7-7 Scale Drawings Warm Up Problem of the Day Lesson Presentation

Scale Drawings & Scale Factor

Warm Up Problem of the Day Lesson Presentation Lesson Quizzes.

Warm Up Write each fraction in the simplest form

7-7 Scale Drawings Warm Up Problem of the Day Lesson Presentation

Bellwork A scale model of the Statue of Liberty is 15 inches tall. If the Statue of Liberty is 305 feet tall, find the scale of the model. A map has.

Warm Up Problem of the Day Lesson Presentation Lesson Quizzes.

Presentation transcript:

Warm up!

Scale drawings are enlarged or reduced drawings that are similar to an actual object or place. – The ratio of a distance in the drawing to the corresponding actual distance is the scale of the drawing! Scale = size of drawing___ OR Scale measurement_ size of actual object Actual measurement

Examples of Scale Drawings Floor plans Microscopic Images Models Maps

Example #1 The height of the symbol is 1.5 inches. The actual symbol will be 96 inches tall once it is created into a statue in my town. If the width of the symbol is 1 inch, how wide will the actual statue be?

Example #2 A model car measures 2cm:1ft of the actual car. Knowing this ratio, set up a proportion to figure out the actual length of the car if the model measured 36cm.

7D LAND -Use the cm side of the ruler to measure the distance between each town -Use the scale to determine the real distance between each town on the map -Answer the questions! Compare with the person next to you.

Tonight’s HW Scale Drawings/Worksheet 10.2 Test is Wednesday! Start Studying tonight. Review study guide.

Important Reminders!! Proportions Test Wednesday – Ratio/Rates/Unit Rates – Finding the “Better Buy” – Identifying Proportions/Solving Proportion Word Problems – Cross Multiply to find “x” in a proportion – Similar Figures – Distance Formula – Scale Drawings