tolong bantu jawab serta caranya ya

sudut LPM dan sudut MPN berpenyiku = 90°
( x + 5 ) + ( 3x + 5 ) = 90°
x + 3x + 5+5 = 90°
4x + 10 = 90°
4x = 90°- 10°
4x = 80°
x = 80/4
x = 20°

besar < LPM = ( x + 5 )
= 20° + 5
= 25°