Nine-gon

Calculate the perimeter of a regular nonagon (9-gon) inscribed in a circle with a radius 13 cm.

Result

x =  80.03 cm

Solution: Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...): Be the first to comment! Next similar math problems:

1. Circle inscribed Calculate the perimeter and area of a circle inscribed in a triangle measuring 3 , 4 and 5 cm.
2. Thales Calculate the length of the Thales' circle described to right triangle with hypotenuse 18.4 cm.
3. Hexagon A Calculate area of regular hexagon inscribed in circle with radius r=9 cm.
4. Hexagon 5 The distance of parallel sides of regular hexagonal is 61 cm. Calculate the length of the radius of the circle described to this hexagon.
5. Height 2 Calculate the height of the equilateral triangle with side 38.
6. Sines In ▵ ABC, if sin(α)=0.5 and sin(β)=0.6 calculate sin(γ)
7. An angle An angle x is opposite side AB which is 10, and side AC is 15 which is hypotenuse side in triangle ABC. Calculate angle x.
8. Circles Three circles of radius 95 cm 78 cm and 64 cm is mutually tangent. What is the perimeter of the triangle whose vertices are centers of the circles?
9. n-gon What is the side length of the regular 5-gon inscribed in a circle of radius 12 cm?
10. n-gon II What is the side length of the regular 5-gon circumscribed circle of radius 11 cm?
11. Equilateral triangle How long should be the minimum radius of the circular plate to be cut equilateral triangle with side 19 cm from it?
12. Cable car 2 Cable car rises at an angle 41° and connects the upper and lower station with an altitude difference of 1175 m. How long is the track of cable car?
13. Trigonometry Is true equality? ?
14. Center traverse It is true that the middle traverse bisects the triangle?
15. Theorem prove We want to prove the sentence: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started?
16. 30-60-90 The longer leg of a 30°-60°-90° triangle measures 5. What is the length of the shorter leg?
17. Reference angle Find the reference angle of each angle: