An octahedron and its net are shown below. All the faces are the same size and shape. What is the surface area of the octahedron?

576 cm2

- 10.4 cm

998.4 cm2

499.2 cm2

12 cm

1,152 cm

12 cm

12 cm

499.2 cm²

Step-by-step explanation:

See attachment for the figure.

The area of a triangle is given by

A = 1/2bh

A = 1/2(12)(10.4)

A = 62.4 cm²

Then, take that area and multiply it by the number of faces. In this problem, there are 8.

62.4 × 8 = 499.2 cm²

it is probably the graph on the bottom right.

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13