Question

1. match the figures to their number of lines of symmetry.

rhombus
isosceles triangle
square
circle
a. one line
b. two lines
c. four lines
d. infinitely many lines

Explanation:

• A rhombus has two lines of symmetry (the diagonals).
• An isosceles triangle has one line of symmetry (the line that bisects the vertex angle and is perpendicular to the base).
• A square has four lines of symmetry (two diagonals and two lines through the mid - points of opposite sides).
• A circle has infinitely many lines of symmetry (any diameter is a line of symmetry).

Answer:

• Rhombus: b. two lines
• Isosceles triangle: a. one line
• Square: c. four lines
• Circle: d. infinitely many lines