Question

Find the distance between the points B and B′ if ΔABC is reflected across line l followed by a reflection across line m.

A.)10 units
B.)14 units
C.)7 units
D.)17 units

Answer 1

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Answer 2

14 units

Explanation:

If l and m are two parallel lines and a point X is reflected across line l followed by a reflection across line m, then the distance between

X and X′ is 2d, where d is the distance between l and m. Since d = 7, the distance between B and B′′ is 2(7) = 14 units.