Answer:
Step-by-step explanation:
The area 
of a triangle is equal to half the product of its length (L) because of its height (h).
The base of the triangles is 
The height of the triangles is 
Then the area of one of the triangles is:
The figure is formed by 12 equal triangles, then the area of the figure 
is:
The surface area of the rectangular prism is 427 mm². The correct option is the second option 427 mm²
<h3>Calculating surface area</h3>
From the question, we are to calculate the surface area of the rectangular prism
Surface area of a rectangular prism can be calculated by using the formula,
Surface area = 2(lw + lh + wh)
Where l is the length
w is the width
and h is the height
In the given diagram,
l = 21.5 mm
w = 4 mm
h = 5 mm
Putting the parameters into the equation, we get
Surface area = 2(21.5×4 + 21.5×5 + 4×5)
Surface area = 2(86 + 107.5 + 20)
Surface area = 2 × 213.5
Surface area = 427 mm²
Hence, the surface area of the rectangular prism is 427 mm². The correct option is the second option 427 mm²
Learn more on Surface area here: brainly.com/question/1310421
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B is the correct answer. Ratios can be expressed as fractions, in word form, or with colons. The ratio of yellow roses to red is 47 to 96, which is the same as 47:96 or 47/96.
Answer:
the answer to this question is seven
Answer:
y=-3x-14
Step-by-step explanation:
