3 years ago

A rectangular prism has dimension of 2 cm by 2 cm by 5 cm.What is its surface area

Mathematics

1 answer:

Eddi Din [679]3 years ago

7 0

Answer:

I think the SA is 48 cm

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Given:

A right angled triangle.

To find:

The value of x.

Solution:

We have,

Base = x

Hypotenuse = $\sqrt{5}$

In a right angle triangle,

$\cos \theta = \dfrac{Base}{Hypotenuse}$

For the given triangle,

$\cos 45^\circ= \dfrac{x}{\sqrt{5}}$

$\dfrac{1}{\sqrt{2}}= \dfrac{x}{\sqrt{5}}$

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Therefore, the required value of x is $\dfrac{\sqrt{10}}{2}$ .

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