Dilations and Similarity | Mathematics - Quizizz

QUIZ

Dilations and Similarity

56%average accuracy

2836 plays

8th grade

Mathematics

a year ago by

20 questions

Q.

What is Dilation?

answer choices

Dilation means to enlarge or reduce a shape

Dilation means to flip over a line

Dilation means two figures that look alike

Dilation means to make a shape smaller

Q.

A triangle has vertices with coordinates A(2,0), B(3, -1) and C(-2,-5). If the triangle is dilated by a scale factor of 3 with the origin as the center of dilation, what are the coordinates of C'?

answer choices

(1,-2)

(-6,-15)

(-2/3,-5/3)

(-5,-8)

Q.

Are these two figures congruent, similar or neither?

answer choices

Congruent

Neither

Similar

Q.

State the coordinate of the image of point B (-10,-6) after a dilation with a scale factor of 1/2.

answer choices

(5,3)

(20,12)

(-20,-12)

(-5,-3)

Q.

Choose the correct scale factor:

answer choices

2.5

1.5

3.5

4

Q.

Are the triangles similar, congruent or neither?

answer choices

Similar

Congruent

Neither

Q.

If two figures are similar, the corresponding angles are...

answer choices

Congruent

Supplementary

Proportional

Different

Q. How does a dilation change the angles of a polygon?

answer choices

It changes by the scale factor.

Dilations do not change the angles.

It is impossible to answer this question. The angles change unpredictably.

The angles all change to larger angles.

Q. If two figures are similar, the corresponding sides are ______________.

answer choices

equal

congruent

proportional

none of these

Q. Solve for X.

answer choices

2 ft

3 ft

4 ft

6 ft

Q.

Tell whether the two figures are congruent or similar.

answer choices

Congruent, because their sides are the same.

Congruent, because their sides are proportional.

Similar, because their sides are the same.

Similar, because their sides are proportional.

They are not congruent or similar.

Q.

Tell whether the two figures are congruent or similar.

answer choices

Congruent, because their sides are the same.

Congruent, because their sides are proportional.

Similar, because their sides are the same.

Similar, because their sides are proportional.

They are neither congruent or similar.

Q.

Are these triangles similar, congruent or neither?

answer choices

Similar

Congruent

Neither

Q.

Are these triangles similar, congruent or neither?

answer choices

Similar

Congruent

Neither

Q.

Are these triangles similar, congruent or neither?

answer choices

Similar

Congruent

Neither

Q.

A ~ B. What is the scale factor of the dilation of A to B?

answer choices

$\frac{4}{3}$

$\frac{3}{4}$

3

4

<p><span class="katex-container" data-idx="0" contenteditable="false"> <span class="katex-display"><span class="katex"><span class="katex-mathml"><math><semantics><mrow><mfrac><mn>4</mn><mn>3</mn></mfrac></mrow><annotation encoding="application/x-tex">\frac{4}{3}</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:2.00744em;vertical-align:-0.686em;"></span><span class="mord"><span class="mopen nulldelimiter"></span><span class="mfrac"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:1.32144em;"><span style="top:-2.314em;"><span class="pstrut" style="height:3em;"></span><span class="mord"><span class="mord">3</span></span></span><span style="top:-3.23em;"><span class="pstrut" style="height:3em;"></span><span class="frac-line" style="border-bottom-width:0.04em;"></span></span><span style="top:-3.677em;"><span class="pstrut" style="height:3em;"></span><span class="mord"><span class="mord">4</span></span></span></span><span class="vlist-s"></span></span><span class="vlist-r"><span class="vlist" style="height:0.686em;"><span></span></span></span></span></span><span class="mclose nulldelimiter"></span></span></span></span></span></span> </span> </p>

alternatives

<p><span class="katex-container" data-idx="0" contenteditable="false"> <span class="katex-display"><span class="katex"><span class="katex-mathml"><math><semantics><mrow><mfrac><mn>3</mn><mn>4</mn></mfrac></mrow><annotation encoding="application/x-tex">\frac{3}{4}</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:2.00744em;vertical-align:-0.686em;"></span><span class="mord"><span class="mopen nulldelimiter"></span><span class="mfrac"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:1.32144em;"><span style="top:-2.314em;"><span class="pstrut" style="height:3em;"></span><span class="mord"><span class="mord">4</span></span></span><span style="top:-3.23em;"><span class="pstrut" style="height:3em;"></span><span class="frac-line" style="border-bottom-width:0.04em;"></span></span><span style="top:-3.677em;"><span class="pstrut" style="height:3em;"></span><span class="mord"><span class="mord">3</span></span></span></span><span class="vlist-s"></span></span><span class="vlist-r"><span class="vlist" style="height:0.686em;"><span></span></span></span></span></span><span class="mclose nulldelimiter"></span></span></span></span></span></span> </span> </p>

<p>3</p>

<p>4</p>

Q. What is the scale factor from triangle ABC to triangle DEF?

answer choices

1/2

7/3

2/1

10/3

Q.

ABC ~ XYZ. What is the scale factor of the dilation of ABC to XYZ?

answer choices

$\frac{2}{3}$

$\frac{3}{2}$

2

3

<p><span class="katex-container" data-idx="0" contenteditable="false"> <span class="katex-display"><span class="katex"><span class="katex-mathml"><math><semantics><mrow><mfrac><mn>2</mn><mn>3</mn></mfrac></mrow><annotation encoding="application/x-tex">\frac{2}{3}</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:2.00744em;vertical-align:-0.686em;"></span><span class="mord"><span class="mopen nulldelimiter"></span><span class="mfrac"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:1.32144em;"><span style="top:-2.314em;"><span class="pstrut" style="height:3em;"></span><span class="mord"><span class="mord">3</span></span></span><span style="top:-3.23em;"><span class="pstrut" style="height:3em;"></span><span class="frac-line" style="border-bottom-width:0.04em;"></span></span><span style="top:-3.677em;"><span class="pstrut" style="height:3em;"></span><span class="mord"><span class="mord">2</span></span></span></span><span class="vlist-s"></span></span><span class="vlist-r"><span class="vlist" style="height:0.686em;"><span></span></span></span></span></span><span class="mclose nulldelimiter"></span></span></span></span></span></span> </span> </p>

alternatives

<p><span class="katex-container" data-idx="0" contenteditable="false"> <span class="katex-display"><span class="katex"><span class="katex-mathml"><math><semantics><mrow><mfrac><mn>3</mn><mn>2</mn></mfrac></mrow><annotation encoding="application/x-tex">\frac{3}{2}</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:2.00744em;vertical-align:-0.686em;"></span><span class="mord"><span class="mopen nulldelimiter"></span><span class="mfrac"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:1.32144em;"><span style="top:-2.314em;"><span class="pstrut" style="height:3em;"></span><span class="mord"><span class="mord">2</span></span></span><span style="top:-3.23em;"><span class="pstrut" style="height:3em;"></span><span class="frac-line" style="border-bottom-width:0.04em;"></span></span><span style="top:-3.677em;"><span class="pstrut" style="height:3em;"></span><span class="mord"><span class="mord">3</span></span></span></span><span class="vlist-s"></span></span><span class="vlist-r"><span class="vlist" style="height:0.686em;"><span></span></span></span></span></span><span class="mclose nulldelimiter"></span></span></span></span></span></span> </span> </p>

<p>2</p>

<p>3</p>

Q. What is the scale factor from ABCD to MNOP?

answer choices

2/3

3/2

2

3

Q.

Are these triangles similar, congruent or neither?

answer choices

Similar

Congruent

Neither

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