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BabaBlast [244]
3 years ago
12

Brainly if u awnser!

Mathematics
1 answer:
just olya [345]3 years ago
4 0

The formula of a perimeter of a rectangle l × w:

P = 2l + 2w

We have the perimeter P = 76 cm and the length l = 20 cm. Substitute:

76 = 2(20) + 2w

76 = 40 + 2w    <em>subtract 40 from both sides</em>

36 = 2w     <em>divide both sides by 2</em>

18 = w

Answer: width = 18 cm.

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wolverine [178]
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Find the with of a triangle as a 15 cm high in a hypogynous of a 19 cm​
Inessa05 [86]

Answer:

This other side of the triangle is equal to about 11.7 cm

Step-by-step explanation:

In order to find out the third side of the triangle we will just use the Pythagoras Theorem.

c^{2} =a^{2} + b^{2}

Since we know the hypotenuse and we know one of the legs, in order to find the second leg we just substitute the values and solve the equation and so we get...

c^{2} =a^{2} + b^{2}\\19^{2} = 15^{2} + b^{2}\\361 = 225 + b^{2} \\

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And so b ≈ 11.66190

8 0
3 years ago
What is X in this situation? I'm thinking that you could get X, via vertical angles, but I'm not too sure.
attashe74 [19]
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