Angle ADE = 75| Desmos

式13: "B" Subscript, 2 , Baseline equals "A" Subscript, 2 , Baseline

equals

式14: "C" Subscript, 1 , Baseline equals "B" Subscript, 1 , Baseline

equals

13.8 5 6 4 0 6 4 6 0 6

式15: "D" Subscript, 1 , Baseline equals "A" Subscript, 1 , Baseline

equals

式16: "E" Subscript, 1 , Baseline equals "B" Subscript, 1 , Baseline minus StartFraction, "C" Subscript, 2 , Baseline Over 2 , EndFraction StartRoot, 3 , EndRoot

equals

6.9 2 8 2 0 3 2 3 0 2 8

式17: "E" Subscript, 2 , Baseline equals StartFraction, "C" Subscript, 2 , Baseline Over 2 , EndFraction

equals

式18: "F" Subscript, 1 , Baseline equals "B" Subscript, 1 , Baseline minus "C" Subscript, 2 , Baseline

equals

5.8 5 6 4 0 6 4 6 0 5 5

式19: "F" Subscript, 2 , Baseline equals "A" Subscript, 2 , Baseline

equals

Graphs

式21: "y" less than 25

式22: left parenthesis, "B" Subscript, 1 , Baseline plus "C" Subscript, 2 , Baseline cos "t" , "C" Subscript, 2 , Baseline sin "t" , right parenthesis

定義域t最小値: 90

less than or equal to "t" less than or equal to

定義域t最大値: 180

式23: left parenthesis, "A" Subscript, 1 , Baseline plus "D" Subscript, 2 , Baseline cos "t" , "D" Subscript, 2 , Baseline sin "t" , right parenthesis

定義域t最小値: 0

less than or equal to "t" less than or equal to

定義域t最大値: 90

式24: polygon left parenthesis, "D" , "E" , "D" , "A" , "B" , "C" , "E" , "A" , right parenthesis

Points

提供：

CE = BF

Two Semicircles