更新1:
求解題步驟
數學題，求2個未知數?
回答 (1)
2020-04-22 5:26 pm
✔ 最佳答案
b+110⁰ = 180⁰ (sum of opp. ∠s. of cyclic quad.)∴ b = 70⁰
360⁰-a = 2*b (∠ at centre = 2 ×∠ at circumference)
360⁰-a = 2(70⁰)
∴ a = 220⁰
收錄日期: 2021-04-24 07:48:02
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20200422090607AAWzPve