2.Which is a correct classification of DEF with vertices D(-3,-2). E(-2,3) and F(1,0)?

Question

3.If AD =5y+7 and BC=7y-3 what must the value of y be to prove AED CEB by the SSS postulate? 

4.Describe the transformation m: (x,y) (-x,-y) 
a.A translation one unit down and one unit to the right. 
b.A reflection across the x-axis. 
c.A rotation 180o with center of rotation (0, 0). 
d.A dilation with a scale factor -1 and center (0, 0). 

5. The polygon Q(3,2), R(6,5), S(6,2) undergoes the transformation 
(x,y) ---> (4x, 4y). Name of the coordinates of the image points? 

a.Q'(3, 2), R'(6, 5), S'(6, 2) 
b.Q'(7, 6), R'(10, 9), S'(10, 6) 
c.Q'(12, 8), R'(24, 20), S'(24, 8) 
d.Q'(-1, -2), R'(2, 1), S'(2, -2)

Answer 1

2. Scalene triangle

3. Insufficient info; but guess AD=BC, so 5y+7=7y-3; 10=2y, y=5

4. c

5. c