D. Icosahedron
<span>In geometry, an icosahedron is a polyhedron with 20 faces. </span>
Answer:
170
Step-by-step explanation:
Let the number of cell phones be x
2 : 3 = 68: x
Product of extremes = product of means
2 * x = 68 * 3
x =
= 34 * 3
x = 102
Number of phones = 102 + 68 = 170
Answer:
$ 17.35
Step-by-step explanation:
Answer:
Step-by-step explanation:
length=1 m
base of triangle=10 m
height=5m
volume= 1/2×10×5×1=25 m cube.
slant height l=√(5²+5²)=√50=5√2
slant surface area=2[5√2×1]=10√2
area of front and back=2×1/2(10×5)=50
total surface area=50+10√2≈50+14.14≈64.14 m²
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