no 3,6,7 yaaa pls bgt

3 .
k = 72
l= p-8
72 = p+p+l+l
= p+p+p-8+p-8
4p - 16 = 72
4p= 72 + 16
4p=88
p = 22 cm
l = 22 -8 = 14 cm

4.L= 6m x 6m = 600x600 cm
= 360.000 cm
L2 = 30x30 = 900
360.000:900 = 400 buah
6.
a+D = 180
5x-38+2X+15 =180
7x - 23 = 180
7x = 180+ 23= 203
x= 29
b= d = 2x+15
2x29 +15 = 73°

7.K = 15+7+15+7 = 44 cm
T^2 = 15^2 - 9^2
T=√225-81
=√144 = 12cm
L= 7x12 = 84 cm^2