ЁЯУв Too many exams? DonтАЩt know which one suits you best? Book Your Free Expert ЁЯСЙ call Now!

    Question

    If ratio of interior & exterior angle of a regular

    polygon is 4:5, then number of sides of the polygon is
    A 20 Correct Answer Incorrect Answer
    B 16 Correct Answer Incorrect Answer
    C 30 Correct Answer Incorrect Answer
    D 18 Correct Answer Incorrect Answer

    Solution

    We know that I + E = 180 & I :E = 4:5 Let I = 4k & E = 5k So 4k + 5k = 180 or 9k =180 or k = 20 ; It means exterior angle = 20 = 360/N or N = 360/20 = 18

    Practice Next
    More Mensuration Questions
    ask-question

    Not sure which exam is best for you Talk to our expert

    Get My Free Call