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2 years ago

Help me please i dont understand this

Mathematics

1 answer:

faltersainse [42]2 years ago

8 0

Firstly find two coordinates that lie on the line, we have (0,6) and (8,10).

Slope= (y2-y1)/(x2-x1)
= (10-6)/(8-0)
= 4/8
= 1/2

The answer is B

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If w = 12 units, x = 7 units, and y = 8 units, what is the surface area of the figure? Figure is composed of a right square pyra

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Step-by-step explanation:

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Height of square pyramid, y = 8 units

Please have a look at the attached image.

Here 2 Surfaces will not be exposed which are base of the square pyramid and the top of the square prism i.e. 2 square surfaces will not be exposed.

Here, surface area of the composite figure will be:

<em>Surface Area of Composite Figure = Lateral surface area of Square Pyramid + Surface Area of 5 surfaces of the square prism</em>

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Let slant height be $l$ units.

Using pythagoras theorem, we can find out the value of $l$ .

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$Hypotenuse^{2} = Base^{2} + Height^{2}\\$

$\Rightarrow l^{2} = (\dfrac{w}{2})^{2} + y^{2}\\\Rightarrow l^{2} = (\dfrac{12}{2})^{2} + 8^{2}\\\Rightarrow l^{2} = {6}^{2} + 8^{2}\\\Rightarrow l^{2} = 36+64 = 100\\\Rightarrow l = 10\ units$

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