問題內容：http://www.fotopu.com/image/534770
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數學 triangles
2014-02-22 11:35 pm
回答 (1)
2014-02-23 2:13 am
✔ 最佳答案
1. x=110⁰y = 180-110-25 = 45⁰
2014-02-22 18:17:16 補充：
cos∠P = 6/10
∠P = 53.13⁰
b = 53.13⁰
RQ² = 10²-6²=64
RQ=8
a=8
2014-02-22 18:19:03 補充：
3
∠ACD = 180 - 35 - 25 = 120⁰
2x = 120⁰
x = 60⁰
y+3=12
y=9
收錄日期: 2021-04-27 20:34:56
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20140222000051KK00111