Question

slo post-test
how many lines of symmetry does the following shape have?
image of two vertically stacked purple circles
0
1
2
3
4

Explanation:

Step1: Recall line of symmetry

A line of symmetry is a line that divides a shape into two mirror - image halves.

Step2: Analyze the shape (two circles stacked vertically)

• Horizontal line of symmetry: A horizontal line passing through the mid - point between the two circles (the line that is halfway up the "8 - like" shape formed by the two circles) will divide the shape into two mirror - image halves. The top circle and the bottom circle will be mirror images with respect to this horizontal line.
• Vertical line of symmetry: A vertical line passing through the center of both circles (the line that goes straight down the middle of the two - circle shape) will also divide the shape into two mirror - image halves. The left and right parts of the shape (with respect to this vertical line) are mirror images.

So, we can see that there are 2 lines of symmetry.

Answer:

2 (corresponding to the option "2" in the multiple - choice options)