Dilations, Congruency and Similarity

What angle is corresponding to angle D?

• A

• B

• C

• F

If ABCDE is similar to LMNOP, which proportion is NOT true?

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If ABCD is similar to EFGH, which proportion is true?

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The two triangles are similar. Solve for X.

• 2 ft

• 3 ft

• 4 ft

• 6 ft

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

• 1/2

• 7/3

• 2/1

• 10/3

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

• 2

• 3

What is the scale factor from ABCD to MNOP?

• 2/3

• 3/2

• 2

• 3

What is Dilation?

• 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

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'?

• (1,-2)

• (-6,-15)

• (-2/3,-5/3)

• (-5,-8)

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

• (5,3)

• (20,12)

• (-20,-12)

• (-5,-3)