✔ 最佳答案
圖片參考:
http://cg-love.com/s1/nfxurob.JPG
設半圓左下角為 S , 連 DS , 則ㄥDSA = x (同弧所對圓周角)
ㄥQDS = ㄥDSA - 45 = x - 45
ㄥQDS = ㄥCAS = x - 45(同孤所對圓周角)
ㄥADS = 90 (半圓所對圓周角)
在△ADS中 , (ㄥCAS + 25) + ㄥDSA + ㄥADS = 180
(x - 45 + 25) + x + 90 = 180
x = 55
圖片參考:
http://cg-love.com/s1/c6sxt9t.JPG
ㄥABE = ㄥACE = 30(同弧所對圓周角)
所以ㄥBAR = ㄥBRA = (180 - 30) / 2 = 75
ㄥADB = ㄥACB = 32 (同弧所對圓周角)
ㄥBRA = ㄥCBR + ㄥACB
75 = ㄥCBR + 32
ㄥCBR = 43 , 所以ㄥCBT = 43 / 2 = 21.5
ㄥCBT = ㄥCAD = 21.5
所以ㄥAQE = ㄥABE + ㄥBAR + ㄥCAD
= 30 + 75 + 21.5
= 126.5