1. Quiz Review Find the scale factor of Figure A to Figure B.
If triangle PQR ~ to triangle STU, then find all possible values of x. B 4 A 6
1: sqrt2 or sqrt2 / 2
X= 5/2 and -5 R P Q
7 - x S T U
13 - x

2. Example 2: C’(-6,6), D’(-10,2) C’(-6,-10), D’(-10,-6)
Plot the given points on graph paper. Draw quadrilateral ABCD and A’B’. Locate points C’ and D’ so that A’B’C’D’ is similar to ABCD.
A(0, 0), B(4, 0), C(2, 4), D(0, 2),
A’(-10, -2), B’(-2, -2)
C’(-6,6), D’(-10,2)
C’(-6,-10), D’(-10,-6)
C’(-6,6), D’(-10,2)
C’(-6,-10), D’(-10,-6)

3. Determine whether each statement is always, sometimes or never
Two congruent triangles are similar
Two squares are similar
A triangle is similar to a quadrilateral
Two isosceles triangles are similar
Two rectangles are similar
Two obtuse triangles are similar
Two equilateral triangles are similar
always
always
never
sometimes
sometimes
sometimes
always

4. Graph the given points. Draw polygon ABCD and segment MN
Graph the given points. Draw polygon ABCD and segment MN. Find the coordinates for vertices L and P such that ABCD~NLPM.
A(2,0), B(4,4), C(0,4), D(-2,0), M(4,0), N(12,0)
L(16,8) and P(8,8) or L(16,-8) and P(8,-8)
L(16,8) and P(8,8) or L(16,-8) and P(8,-8)

5. State if the polygons are similar and how.1. 2.
Similar
Not similar
Not similar
similar

6. Write the similarity statement, and find x, the measures of the indicated sides, and the scale factor. D E C A B 6
12-x 4
x+7