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3 years ago

How do you prove that lines are similar in triangles if it is parallel? (look at photo)

Mathematics

1 answer:

Ghella [55]3 years ago

5 0

Answer:

they are similar cuz it resembles a "z" pattern. The angles are so the same.

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The figure shows three quadrilaterals on a coordinate grid:

makkiz [27]

Answer:

E and G are similar but not congruent.

Step-by-step explanation: I don't really know how to explain this but I am positive this is the answer.

6 0

3 years ago

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(URGENT) need this for today!

Zigmanuir [339]

Answer:

right triangel

Step-by-step explanation:

the sides just add up to that i thinl

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3 years ago

An equilateral triangle has a perimeter of 48 cm. What is the area?

KiRa [710]

Answer:

$A=64\sqrt{3}\ cm^2$

Step-by-step explanation:

we know that

An <u><em>equilateral triangle</em></u> has three equal sides and three equal interior angles (each interior angle measure 60 degrees)

The perimeter is equal to

$P=3b$

where

b is the length side of the equilateral triangle

we have

$P=48\ cm$

substitute

$48=3b$

solve for b

$b=48/3\\b=16\ cm$

Find the area

The formula of area applying the law of sines is equal to

$A=\frac{1}{2}b^2sin(60^o)$

substitute the value of b

$A=\frac{1}{2}(16)^2sin(60^o)$

$sin(60^o)=\frac{\sqrt{3}}{2}$

$A=\frac{1}{2}(16)^2(\frac{\sqrt{3}}{2})$

$A=64\sqrt{3}\ cm^2$

6 0

3 years ago

The sum of the digits of a certain two-digit number is 7. Reversing its digits increase the number by 9. What is the number?

Elis [28]

Let the two numbers be x and y.

According to your question;

x + y = 7
10y + x = 10x + y + 9

By equation 1 ; x = 7-y

Substituting the value of x ;

10y + ( 7 -y) = 10(7-y) + y + 9

9y + 7 = 70 -10y + y + 9

9y + 7 = 70 - 9y + 9

=> 18y = 70 -7 + 9
=> 18y = 72
=> y = 4

Substituting for x ;

x = 7 - y
=> x = 7 -4
=> x = 3

Thus, x = 3 and y = 4;
=> The number is 34.

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3 years ago

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Help me with this please

Pavel [41]

bro

Step-by-step explanation:

5 0

3 years ago