Question

Ini gmna ya no 3 mohon bantuan nya aku ksh poin 15

Answer 1

3. I. 90°=2a +3a
       5a = 90°
         a = 18°
   II. 180°=46°+ a+29°+5a+15°
       6a+90°=180°
       6a = 90°
         a = 15°

Answer 2

Gambar 1 : 2a + 3a = 90° ( Siku siku )
5a = 90°
a = 90° / 5
a = 18 °

Gambar 2 : 46 + ( a + 29 ) + ( 5a + 15 ) = 180° ( Lurus )
( a + 29 ) + ( 5a + 15 ) = 180° - 46 = 134
6a + 44 = 134
6a = 134 - 44 = 90
a = 90 / 6 = 15
a = 15°