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liq [111]
3 years ago
11

HELP! In rectangle DEBC, Eb = 12 and Cb =4. What is the approximate distance from point E to point C? (I’m giving away robux to

who ever helps me)

Mathematics
1 answer:
pav-90 [236]3 years ago
4 0

Answer:

12.65

Explanation:

By using pythagoras theorem :

(CE)^2 = (EB)^2 + (CB)^2

= (12)^2 + (4)^2

= 144+16

CE = (Root sign)160

= Approx. 12.64 rounded off to 12.65

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Step-by-step explanation:

Demonstrating the Pythagorean Theorem

When you think of each side of a right triangle as also being a side of a square that's attached to the triangle. The area of a square is any given side multiplied by itself. (For example, b x b = b^2).

In order to show that a^2 + b^2 = c^2,

follow these steps:

Get a right triangle on grid paper that you can print. You'll also need scissors, and a ruler.

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Make three squares with sides that are equal to each side of the triangle. Begin with side

a. Measure the length of side a. On the blank piece of grid paper,

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- Label this square a2.

- Repeat these steps to create squares for sides b and c. (If you don't have a ruler, just use the triangle as a guide; trace the length of one side, and then draw three more sides of the same length to make a square.)

Cut out the squares. Place each square next to the corresponding sides of the triangle.

Now show that a2 + b2 = c2. Place the squares made from sides a and b on top of square c. You will have to cut one of the squares to get a perfect fit.

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The total area of a big square, where each side having a length of a+b, is:

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Adding up the tilted square and the 4 triangles gives: A = c^2 + 2ab

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The area of the large square is equal to the area of the tilted square and the 4 triangles. This can be written as:

(a+b)(a+b) = c^2 + 2ab

By rearrange this, we shall see if we can get the pythagoras theorem:

Start with:(a+b)(a+b) = c^2 + 2ab

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Subtract "2ab" from both sides: a^2 + b^2 = c^2

Therefore, it's been proven that, a^2 + b^2 = C^2

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3 years ago
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