Checking for Scaled Copies

Are these 2 triangles scaled copies of each other by looking at their measurements: Triangle A - 28°, 31° and Triangle E - 117°, 31°.

• Yes, all 3 angles add to 180°.

• Yes, because 31° is in both triangles.

• No, Triangle A needs a third angle to be 121° & Triangle B needs a third angle to be 32°.

• Yes, they are both triangles.

Tags

CCSS.8.G.A.3

Are these 2 triangles scaled copies of each other by looking at their measurements: Triangle J - 134°, 11° and Triangle K - 35°, 11°.

• Yes, all 3 angles add to 180°.

• Yes, because 11° is in both triangles.

• No, they have different measures

• Yes, they are both triangles.

Tags

CCSS.8.G.A.3

Use the side lengths to decide if these 2 triangles are scaled copies of each other. Triangle L: 10, 14, 16 and Triangle X: 56, 40, 64

• No, the ratios of the sides are not equal.

• Yes, the ratios of the sides are equal

• No, they don't have the same area.

• Yes, because 2 sides have a zero in them.

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Can a 3 foot-by-9 foot rectangle be a scaled copy of 3 foot-by-1 foot rectangle?

• No, because rectangles are scaled copies

• No, because 3 foot to 3 foot is a scale of 1 and 1 foot to 9 foot is a scale of 9.

• Yes, because they are rectangles and all rectangles are scaled copies of each other.

• Yes, even if the dimensions are written in a different order they still have an equal ratio.

Tags

CCSS.7.G.A.1

The ratio of length to width of a rectangle is 1.5. A scaled copy as a width of 6. What is the length of the scaled copy?

• 4

• 9

• 18

• 1.5

Tags

CCSS.7.G.A.1

What is the scale factor you can apply to figure X to get figure Y?

• $\frac{1}{6}$

• $\frac{1}{3}$

• 3

• 6

Tags

CCSS.7.G.A.1

What is the scale factor you can apply to figure Y to get figure X?

• $\frac{1}{6}$

• $\frac{1}{3}$

• 3

• 6

Tags

CCSS.7.G.A.1

Do you agree?

• Yes, she set up the correct ratios.

• No, she needs to match them up by size. $\frac{4}{6}=\frac{6}{9}=\frac{8}{12}$

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

What shapes are always scaled copies of each other?

• Rectangle

• Square

• Isosceles Triangle

• Right Triangle

• Equilateral Triangle

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6