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3 years ago

What is the surface area of the composite figure

Mathematics

1 answer:

leva [86]3 years ago

6 0

Answer:

The answer is 672.

Step-by-step explanation:

To solve this problem, first let's find the surface area of the rectangular prism. To do that, multiply each dimension with each (times 2 | just in case you don't understand [what I'm talking about is down below]).

8 x 8 x 2 = 128

8 x 11 x 2 = 176

Then, add of the products together to find the surface area of the rectangular prism.

176 + 176 + 128 = 480

Now, let's find the surface area of the square pyramid. Now, for this particular pyramid, let's deal with the triangles first, then the square. Like we did with the rectangular prism above, multiply each dimension with each other (but dividing the product by 2 | in case you don't understand [what i'm talking about is down below]).

8 x 8 = 64.

64 ÷ 2 = 32.

SInce there are 4 triangles, multiply the quotient by 4 to find the surface area of the total number of triangles (what i'm talking about is down below).

32 x 4 = 128.

Now, let's tackle the square. All you have to do is find the area of the square.

8 x 8 = 64.

To find the surface area of the total square pyramid, add both surface areas.

128 + 64 = 192.

Finally, add both surface areas of the two 3-D shapes to find the surface area of the composite figure.

192 + 480 = 672.

Therefore, 672 is the answer.

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4 years ago

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Please answer this ASAP. The question is down below. Thank you!

Sonja [21]

Answer:

$y = .5x^2 -2x -5$

Step-by-step explanation:

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In y = x^2 the 2nd lowest point is just up 1 and right 1 away from the vertex.

This is not true for our parabola.

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So far we’ve got y = .5x^2

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Now for the x value.

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So the full equation is $y = .5x^2 -2x -5$

Look at the image below to compare.

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3 years ago

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Please help I’ll mark brainliest if u give a small explanation

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The answer is 4 because the bottom and line DE form a right angle

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3 years ago

the sum of three decimal numbers is 6 exactly one of the numbers is less than 1 what could the numbers be

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4 years ago