创建以质心为中心的三角形图像

Question

对不起，我对编程有点陌生。基本上，我被分配到“分析”并生成一个三角形的图像，其中用户指定两条边的长度和它们之间的角度大小，程序运行并找到第三条边的长度以及两条边其他角度（使用余弦定律）。然后我必须有所有边长的文本输出，所有角度测量（可选），并以我的海龟的形式打印该区域，在图像中打印出“这是你的三角形 \n 它有一个 x 平方像素的区域”也是。 此外，三角形的质心必须位于 (0,0)。这是我目前所拥有的：

import math
from turtle import*



print("This program will draw a custom triangle.")
firstside=float(input("Enter length of first side (between 10 and 400 pixels): "))
secondside=float(input("Enter length of second side (between 10 and 400 pixels): "))
includedangle=float(input("Enter the measure of the included angle in degrees (between 1 and 179): "))

print("Side lengths and angle measures:\n")





solvedthirdside=float(math.sqrt(firstside**2+secondside**2-(2*firstside*secondside*math.cos(includedangle))))

cage=Screen(); #Create screen object named cage
cage.setup(500,500) #set screen size to 500x500 pixels

另外，我也在使用海龟图形。

我真的很挣扎。一些帮助将不胜感激！ 请帮忙！谢谢！

Answer 1

这还没有完成，但现在应该更容易处理了。

我已将其彻底分解为功能并进行了大量评论；它应该很容易理解。希望对您有所帮助！

import math
import turtle

def get_float(prompt):
    """
    Prompt for input and return it as a floating-point number
    """
    while True:
        try:
            return float(input(prompt))
        except ValueError:
            pass

def third_side(a, b, C):
    """
    Given a triangle defined by two sides and
    the angle between them (in degrees),
    return the length of the third side
    """
    return math.sqrt(a**2 + b**2 - 2. * a * b * math.cos(math.radians(C)))

def get_sides():
    """
    Prompt for a triangle as two sides and an angle,
    calculate the length of the third side,
    and return the three side lengths
    """
    side1 = get_float("Length of first side  (pixels, in 10..400)? ")
    side2 = get_float("Length of second side (pixels, in 10..400)? ")
    angle = get_float("Included angle (degrees, in 1..179)? ")
    return side1, side2, third_side(side1, side2, angle)

def get_angle(opp, left, right):
    """
    Given three sides of a triangle,
    return the angle opposite the first side (in degrees)
    """
    cos_opp = (left**2 + right**2 - opp**2) / (2. * left * right)
    return math.degrees(math.acos(cos_opp))

def get_angles(a, b, c):
    """
    Given three sides of a triangle,
    return the three angles (in degrees)
    """
    return get_angle(a, b, c), get_angle(b, c, a), get_angle(c, a, b)

def main():
    print("This program will draw a custom triangle.\n")
    side1, side2, side3    = get_sides()
    angle1, angle2, angle3 = get_angles(side1, side2, side3)

    print(
        "\n"
        "Sides and angles:\n"
        "a = {side1:>5.1f}    A = {angle1:>5.1f}\n"
        "b = {side2:>5.1f}    B = {angle2:>5.1f}\n"
        "c = {side3:>5.1f}    C = {angle3:>5.1f}\n"
        .format(
            side1=side1,   side2=side2,   side3=side3,
            angle1=angle1, angle2=angle2, angle3=angle3
        )
    )

    # Your code continues here!

if __name__=="__main_":
    main()