Exploring Similar Shapes and Scale Drawings

The video tutorial covers similar shapes and scale drawings. It explains that similar shapes have the same angles but different sizes, and their sides are proportional. The tutorial demonstrates how to set up and solve proportions to find missing side lengths in similar triangles. It also introduces scale drawings, explaining how to use a given scale to determine actual distances or sizes. The video provides examples and encourages viewers to pause and review as needed.

What remains constant in similar shapes regardless of their size?

• Perimeter

• Color

• Angle measures

• Area

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CCSS.8.G.A.2

CCSS.HSG.CO.B.6

What must be true about the sides of similar shapes?

• They are of equal length

• They are parallel

• They are congruent

• They are proportional

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CCSS.8.G.A.2

CCSS.HSG.CO.B.6

What is the purpose of setting up proportions in the study of similar shapes?

• To find the area of the shapes

• To compare their perimeters

• To determine if side lengths are proportional

• To calculate the volume

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CCSS.HSG.SRT.A.2

How do you find a missing side length in similar triangles?

• Add the lengths of known sides

• Measure with a ruler

• Use the Pythagorean theorem

• Set up and solve a proportion

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CCSS.HSG.SRT.B.5

In the example, if side AB in triangle ABC is 3 units and side XY in triangle XYZ is 'n' units, what is the proportion set up to find 'n'?

• AB/XY = XY/AB

• AB/XY = BC/YZ

• AB/BC = XY/YZ

• AB/XY = BC/YZ

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CCSS.HSG.SRT.A.2

What method is used to solve the proportions in the examples given?

• Subtraction method

• Cross multiplication

• Addition method

• Division method

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CCSS.6.EE.B.7

What is the result of the cross multiplication when solving for 'n' if AB is 3 and XY is 'n', and AC is 9 and XZ is 12?

• 3n = 108

• 12n = 27

• 9n = 36

• 3n = 36

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CCSS.HSG.SRT.B.4

What does a scale of 1 inch equals 100 feet mean in a scale drawing?

• 1 foot in reality is 100 inches in the model

• 100 inches in the model represent 1 foot in reality

• 1 inch in the model represents 100 feet in reality

• 100 feet in reality represent 1 inch in the model

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CCSS.7.G.A.1

How do you calculate the model height if the actual height is 604 feet and the scale is 1 inch equals 100 feet?

• Divide 604 by 100

• Multiply 604 by 100

• Divide 100 by 604

• Multiply 100 by 604

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CCSS.7.G.A.1

What additional resources are suggested for further learning about similar shapes and scale drawings?

• Online videos

• Museum exhibits

• Textbooks

• None

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CCSS.8.G.A.2

CCSS.HSG.CO.B.6