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Open Up - Grade 8 - Mathematics - Unit 2 - Lesson 3

Last updated almost 3 years ago

10 Nsɛmmisa

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"Source: Open Up Resouces (Download for free at openupresources.org.)"

Asemmisa {{asɛmmisaAhyɛnsode}}

1.

Segment AB measures 3 cm. Point O is the center of dilation. How long is the image of AB after a dilation with . . .
Scale factor 5?

Asemmisa {{asɛmmisaAhyɛnsode}}

2.

Segment AB measures 3 cm. Point O is the center of dilation. How long is the image of AB after a dilation with . . .
Scale factor 3.7

Asemmisa {{asɛmmisaAhyɛnsode}}

3.

Segment AB measures 3 cm. Point O is the center of dilation. How long is the image of AB after a dilation with . . .
Scale factor \frac{1}{5}?

Asemmisa {{asɛmmisaAhyɛnsode}}

4.

Segment AB measures 3 cm. Point O is the center of dilation. How long is the image of AB after a dilation with . . .
Scale factor s?

Asemmisa {{asɛmmisaAhyɛnsode}}

5.

Here are points A and B. Plot the points for each dilation described.
C is the image of B using A as the center of dilation and a scale factor of 2.
D is the image of A using B as the center of dilation and a scale factor of 2.
E is the image of B using A as the center of dilation and a scale factor of \frac{1}{2}.
F is the image of A using B as the center of dilation and a scale factor of \frac{1}{2}.

Asemmisa {{asɛmmisaAhyɛnsode}}

6.

Make a perspective drawing.
Include in your work the center of dilation, the shape you dilate, and the scale factor you use.

Asemmisa {{asɛmmisaAhyɛnsode}}

7.

Triangle ABC is a scaled copy of triangle DEF. Side AB measures 12 cm and is the longest side of ABC. Side DE measures 8 cm and is the longest side of DEF.
Triangle ABC is a scaled copy of triangle DEF with what scale factor?(Leave your answer as a fraction.)

Asemmisa {{asɛmmisaAhyɛnsode}}

8.

Triangle ABC is a scaled copy of triangle DEF. Side AB measures 12 cm and is the longest side of ABC. Side DE measures 8 cm and is the longest side of DEF.
Triangle DEF is a scaled copy of triangle ABC with what scale factor?(Leave your answer as a fraction.)

Asemmisa {{asɛmmisaAhyɛnsode}}

9.

The diagram shows two intersecting lines.
Find the missing angle measures.(One Measurement per answer)

52
82
78
102
98
58

Angle A
Angle B
Angle C

Asemmisa {{asɛmmisaAhyɛnsode}}

10.

Find the side lengths of DEF and the angle measures of ABC.
(Mark your answers on the table below.)