Question: 3. Consider the regular octagon (an eight-sided figure) to the right. [3] (a) How many lines of symmetry does a regular octagon have? Describe them.

3. Consider the regular octagon (an eight-sided figure) to the right. [3] (a) How many lines of symmetry does a regular octagon have? Describe them. A drawing may help. [4] (b) How can you find out the measure of the interior angle of a regular octagon without using the formula? Describe the method and calculate the angle. [3] (c) What is the total number of all diagonals we can draw in the octagon? Explain your reasoning.

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