Question

Diketahui <A=(2x+20)° dan <B=(3x+10)° saling berpenyiku, besar <A adalah? A.46° B.44° C.40° D.36° tolong cara kerjanya

Answer 1

<a + <b = 90°

Nyari X dulu
= 2x+20 + 3x+10 = 90°
= 5x + 30 = 90°
= 5x = 90-30
= 5x = 60
= x = 12

Besar <a
= 2x+20
= 2x(12) +20
= 24 + 20
= B. 44°