tolong pake caranya dari 6sampe 10 thanks

6) L persegi panjang = p × l
40 cm = p × 5
p= 40 : 5
p= 8

7) BO= √5²- 3² = √25 - 9= √16 = 4
BD = BO +OD= 4 +4 = 8

8) A = 90°
D= 90°
B+C = 360° - (90°+90°)
B+C = 360-180
B+C= 180
B = 4/9 × 180°= 80°
C= 5/9 × 180°= 100°

9)a. x= 180° - (73+49)° = 58°

b. 3x +x +90°= 180°
4x = 180°-90°
4x = 90°
x = 22,5°

c. x +5 +x+x+1 = 180
3x = 180-6
3x= 174
x=58

d. 3x +4x +x= 180°
8x = 180
x= 180:8
x= 22,5

10) luas= ½×12 ×7= ½×84 =42cm²