sebuah trapesium siku-siku PQRS siki-siku di p dengan PQ //RS .JIKA

<Q : < R = 4 : 5 ==> 4x : 5x

<Q + <R = 180°
4x + 5x = 180°
9x =180°
x = 180°/9
x = 20°

<Q = 4x = 4×20° = 80°
<R = 5x = 5×20° = 100°

<P =<S = 90°


smga mmbantu