Question 3 of 17beginner🔧 ApplyShort Answer3 marks
Write formulas for the perimeter of: (a) triangle with all sides equal. (b) a regular pentagon (as we have learnt last year, we use the word 'regular' to say that all sidelengths and angle measures are equal) (c) a regular hexagon
(a)
Answer
Perimeter = 3 × s (where s is the side length)
(b)
Answer
Perimeter = 5 × s (where s is the side length)
(c)
Answer
Perimeter = 6 × s (where s is the side length)
Explanation
(a) An equilateral triangle has 3 equal sides, so perimeter is 3 times the side length. (b) A regular pentagon has 5 equal sides, so perimeter is 5 times the side length. (c) A regular hexagon has 6 equal sides, so perimeter is 6 times the side length.