NEW : Green Area = 4| Desmos

式16: "C" Subscript, 1 , Baseline equals StartFraction, 50 Over "B" Subscript, 2 , Baseline , EndFraction

equals

式17: "C" Subscript, 2 , Baseline equals "A" Subscript, 2 , Baseline

equals

式18: "D" Subscript, 1 , Baseline equals "T" Subscript, 1 , Baseline

equals

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

equals

式20: "L" Subscript, 1 , Baseline equals "T" Subscript, 1 , Baseline plus 0.3 5cosine theta Subscript, 1 , Baseline

equals

1.6 6 7 9 6 0 8 4 5 6 8

式21: "L" Subscript, 2 , Baseline equals "T" Subscript, 2 , Baseline plus 0.3 5sine theta Subscript, 1 , Baseline

equals

3.8 8 9 3 2 0 2 8 1 8 9

式22: theta Subscript, 1 , Baseline equals 180 minus tangent to the negative 1st power StartFraction, "B" Subscript, 2 , Baseline Over "C" Subscript, 1 , Baseline , EndFraction plus 45

equals

198.4 3 4 9 4 8 8 2 3

Graphs

式24: "y" less than 25

式25: polygon left parenthesis, "A" , "B" , "C" , right parenthesis

式26: polygon left parenthesis, "A" , "D" , "T" , right parenthesis

式27: polygon left parenthesis, "A" , "T" , "D" , "T" , "A" , "B" , "C" , right parenthesis

式28: left parenthesis, left bracket, "A" Subscript, 1 , Baseline , "D" Subscript, 1 , Baseline , right bracket plus 0.3 5cos 45 , 0.3 5 "t" sin 45 , right parenthesis

定義域t最小値:

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

定義域t最大値:

式29: left parenthesis, left bracket, "A" Subscript, 1 , Baseline , "D" Subscript, 1 , Baseline , right bracket plus 0.3 5 "t" cos 45 , 0.3 5sin 45 , right parenthesis

定義域t最小値:

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

定義域t最大値:

式30: left parenthesis, "L" Subscript, 1 , Baseline plus StartFraction, 0.3 5 "t" cos left parenthesis, theta Subscript, 1 , Baseline minus 135 , right parenthesis Over StartRoot, 2 , EndRoot , EndFraction , "L" Subscript, 2 , Baseline plus StartFraction, 0.3 5 "t" sin left parenthesis, theta Subscript, 1 , Baseline minus 135 , right parenthesis Over StartRoot, 2 , EndRoot , EndFraction , right parenthesis

定義域t最小値:

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

定義域t最大値:

式31: left parenthesis, "L" Subscript, 1 , Baseline plus StartFraction, 0.3 5 "t" cos left parenthesis, theta Subscript, 1 , Baseline plus 135 , right parenthesis Over StartRoot, 2 , EndRoot , EndFraction , "L" Subscript, 2 , Baseline plus StartFraction, 0.3 5 "t" sin left parenthesis, theta Subscript, 1 , Baseline plus 135 , right parenthesis Over StartRoot, 2 , EndRoot , EndFraction , right parenthesis

定義域t最小値:

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

定義域t最大値:

Points

提供：

Triangle ABC Area = 25

Triangle ADT Area = ?