Benar atau salahtolong pake cara ya kaktolong bantu kak​

5. sudut siku² = 90°

<SOT = 65°

penyiku <SOT = 90°-65° = 25°(<TOP)/ Salah

6. 6y +12 = 8y -4

6y-8y = -4-12

-2y = -16

y = 8

8y -4 +20x +40=180

8.8 -4 +20x +40=180

60 + 20x + 40 = 180

20x = 180-60-40

20x = 80

x = 4 (salah)

6. OB = √25²-20²=√625-400=√225=15cm

BD = 2 x 15 cm = 30 cm

AC = 30 cm

L = 1/2 x (d1 xd2)

= 1/2 x (30 x 30)

= 1/2 x 900

= 450 cm² ( Benar)