pliss tolong jawab yaa soal inii tolong bantu akuu yaaa

Dik;
<A = 65°
<B = 90° (siku")
<D = 29a+10

Dit;
<C = ?

Jawab;
mencari <C;
jumlah sudut segitiga = 180°
<A+<B+<C = 180°
65°+90°+<C = 180°
<C = 180°-65°-90°
<C = 25°

maka a;
<C+<D = 180°
25+29a+10 = 180°
29a = 180°-10°-25°
29a = 145
a = 145/29
a = 5

maaf kalo salah
semoga membantu:)