Answer:
49 cm²
Step-by-step explanation:
Formula for area:
a = l (length) x w (width)
if its 7 cm on each side, then the length and width will be 7
7*7 = 49 cm²
305-35=270 (SA of 3 triangular faces)
270/3=90 (area of one face)
A=.5BH
90=.5(9)H
90=4.5H
H=20 in
Answer:
L: 19, W: 5 Area: 70
Step-by-step explanation:
2 * (L+W) = 38
L + W = 19
L = 2 * W + 4
2 * W + 4 + W = 19
3W=15
W=5
L=14
Area= 5 x 14 =70
