Need help with calculations

Question

This part of my code has to find out the spike base, spike height, chord length, perimeter, and area of a star polygon when the user inputs the edge length and inner angle. Here is how my code looks like https://code.sololearn.com/cgfBBd1sy85r

in the example that my code is suppose to match, when you input 45 for both the inner angle and the edge length I'm suppose to get...

Calculations for a Threestar Polygon
Edge Length: 45.00
Outer angle: 165.00
Inner angle: 45.00
------------------------------------
Spike base: 34.44
Spike height: 41.57
Chord length: 89.23
Height: 77.28
Perimeter: 270.00
Area: 2661.48

also what do I include so that the values are displayed with two decimal points?

Answer 1

If am understood correctly, then I say read about setprecision methods ....

put this, line before outputting spike Bike.
cout << fixed << setprecision(2) << spikeBase << endl;