Let's determine the number of lines of symmetry each figure has.
A line of symmetry can be said to be an imaginary line which when it passes through the shape, it divides it exactly into two identical halves.
Hence, we have the following:
• Triangle A:
The figure has one line symmetry since it is an isosceles triangle.
• Triangle B.
Since the triangle has 3 unequal sides, it is a scalene triangle.
The triangle has no line of symmetry.
• Triangle C.
Triangle 3 has 3 equal sides. So, it is an equilateral triangle.
Since all 3 sides are equal, the figure has 3 lines of symmetry.
ANSWER:
a) 1
b) 0
c) 3