Question

Find the distance between the points B and B′′ if ΔABC is reflected across the line l to form ΔA′B′C′, followed by a reflection across line m to form ΔA′′B′′C′′



A)


5


B)


2.5


C)


10


D)


20

Answer 1

Answer:

C) 10

Step-by-step explanation:

When we reflect triangle ABC across line l the distance BB' will be 1*2=2.

When we reflect triangle A'B'C' across line m the distance B'B" will be 4*2=8

So the distance BB" will be 2+8=10