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3 years ago

PLEASE HELP THIS IS A QUESTION OF LIFE OR DEATH

Mathematics

2 answers:

maksim [4K]3 years ago

7 0

Answer:

The third option is the correct answer.

Step-by-step explanation:

The triangles are reflected across the line y = x

When a triangle is reflected across the line y = x, this means that the x-coordinate and y-coordinate have changed their places. We must know that each point of a reflected image and the original image are at the same distance from the the line of reflection.

den301095 [7]3 years ago

4 0

C because the x-axis and the y-axis are switched, basically.

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Can someone please help me on this simple geometry question

Elan Coil [88]

Answer:

x=7

Step-by-step explanation:

The two lines indicate that it is an isosceles triangle. This means that the bottom two angles and lengths are the same.

To work this out you would first minus 104 from 180, this gives you 76. Then you would multiply 25 by 2, which gives you 50. This is because the angles are the same. Then you would add 50 to 76, which gives you 126. Then you would multiply 9 by 2, which gives you 18. This is because it is an isosceles triangle and the bottom two sides are the same. Then you would divide 126 by 18, which gives you 7.

1) Minus 104 from 180.

$180-104=76$

2) Multiply 25 by 2.

$25*2=50$

3) Add 50 to 76.

$50+76=126$

4) Multiply 9 by 2.

$9*2=18$

5) Divide 126 by 18.

$126/18=7$

6) $x=7$

Answer Checking:

To check your answer you would work backwards. First you would multiply 7 by 18, which gives you 126. Then you would minus 50 from 126, which gives you 76. Then you would add 104 to 76, which gives you 180.

1) Multiply 7 by 18.

$7*18=126$

2) Minus 50 from 126.

$126-50=76$

3) Add 104 to 76.

$104+76=180$

Because it is a triangle the internal angles all add up to 180. And so if your answer is 180 then the steps are correct.

6 0

3 years ago

Please Help!! :D Find the value of y.

rjkz [21]

Answer:

$y=2\sqrt{2}$

Step-by-step explanation:

The Pythagorean theorem is a theorem that can be applied to the sides of a right triangle. Please note that a right angle refers to an angle with a measure of (90) degrees. A box around an angle shows that the angle is a right angle, or has a measure of (90) degrees. The Pythagorean theorem states the following,

$a^2+b^2=c^2$

Where (a) and (b) are the legs of the triangle, or the side adjacent to the right angle in the right triangle. (c) is the side opposite the right angle, or the hypotenuse of the triangle. One can apply this theorem to the smallest triangle in the diagram to find (y),

$a^2+b^2=c^2$

Substitute,

$(1)^2+(y)^2=(3)^2$

Simplify,

$(1)^2+(y)^2=(3)^2$

$1+y^2=9$

Inverse operations,

$1+y^2=9$

$y^2=8$

$y=\sqrt{8}$

Take a factor from out of the square root. Remember that a number times itself under the radical is equal to the number. This can be simply stated as the following: ( $\sqrt{a*a}=a$ ),