Similar Figures
If triangle ABC is congruent to triangle DEF. Which statement is true?
A. angle A is congruent to angle F
B. angle A is congruent to angle D
C. angle A is congruent to angle E
D. angle A is congruent to angle C
B.
What does this notation mean?
(x + 5, y + 3)
5 units right and 3 units up
What operation do you use in order to calculate dilations?
multiply
A student’s rectangular desk is 30 inches long and
18 inches wide. The teacher’s rectangular desk is 60 inches
long and 36 inches wide. Are the desks similar?
yes
What is the notation for a reflection across the y-axis?
(-x,y)
The coordinates and scale factor is given below.
J(-4,1) K(0,4) L(-4,2) scale factor = 1/2
What are the new coordinates.
J'(-2,.5) K'(0,2) L'(-2,1)
A map has a scale of 3 cm : 18 km. If
Riverside and Smithville are 54 km apart
then they are how far apart on the map?
9 cm
What is the notation for a 90 degree rotation?
(y, -x)
Kiesha used a photo that measured 4 inches by 6 inches to make a copy that measured 8 inches by 12 inches. What is the scale factor of the dilation?
scale factor is 2.
A 6 ft tall tent standing next to a cardboard
box casts a 9 ft shadow. If the cardboard
box casts a shadow that is 6 ft long then how
tall is it?
4 ft
What is the notation for a 270 degree rotation?
(-y,x)
A square has vertices J(–1, 4), U(5, 4), M(5, –2), P(–1, –2). After a dilation, square JUMP has vertices
J(–0.5, 2),U(2.5, 2), M(2.5, –1), P(–0.5, –1). What is the scale factor of the dilation?
scale factor= 1/2