Answer:
16 cm
Step-by-step explanation:
Let the width be x
The length will be 3 x since the length is three times the width
Perimeter=2(l+w) where l is length and w is width
By substituting 128 cm for perimeter, x for w and 3 x for l then
128=2(3x+x)
128=8x
Therefore, the width is 16 cm, the width is 16*3=48 cm
2a + 8b
55°
y+x=180°
25°+30°+x=180°
25°+30°=y
y=55°
*Exterior Angle Theorem*
<u><em>Sorry for the lack of explanation. It's midnight, so I didn't have much time.</em></u>
of means multiply
4/3 x 21/1
= 84/3
= 28
2/3 x 21/1
=42/3
= 14
11 = 3 - 4/3x
11 = (9 - 4x)/3
33 = 9 - 4x
24 = -4x
24/4 = - x
x = -6