Question

A triangle has vertices A(1, 3), B(-2, 1) and C(0, 4). If the triangle is reflected over the y-axis, what are the coordinates of B'?

Answer 1

When you reflect a point over the y-axis, the x-coordinate of the point is negated while the y-coordinate remains the same. To find the coordinates of B' after reflecting point B over the y-axis, you can negate the x-coordinate of B and keep the y-coordinate the same.

Coordinates of B(-2, 1):

After reflecting over the y-axis:

B'(-(-2), 1) = B(2, 1)

So, the coordinates of B' are (2, 1).