Besar cbd (3p°+40°)adalah?

Jawab
=> ( 2p ) + ( 3p + 40 ) = 180
=> 2p + 3p = 180 - 40
=> 5p = 140
=> p = 28

Besar CBD
=> ( 3p + 40 )
=> 3 x 28 + 40
=> 84 + 40
=> 124° ( D )

Semoga Bermanfaat {^=^}
Makasih:D

2p° + 3p° + 40° = 180°
5p° = 180° - 40°
5p° = 140°
p = 140°/5
= 28°

< CBD = 3p° + 40°
= 3(28°) + 40°
= 84° + 40°
= 124°