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3 years ago

I WILL AWARD BRAINLIEST!!!! PLEASE HELP!!!!!

Mathematics

1 answer:

Dahasolnce [82]3 years ago

4 0

as AB || DE then

angle BAE = angle AED

so angle AED = 70

as AD = AE then

angle AED = angle ADE = 70

now in a triangle

angle DAE + Angle ADE + angle AED = 180

angle DAE + 70 + 70 = 180

angle DAE = 180 - 140 = 40

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Help i give u brainliest

Anna11 [10]

Answer:

1:4

Step-by-step explanation:

1.2 cm of white fabric per 48 mm of colored fabric:

1.2 cm : 48 mm= 12 mm: 48 mm= 1:4

The ratio is: 1:4

6 0

3 years ago

Read 2 more answers

20 POINTS !!!!!! Determine whether side-side-angle (SSA) is a valid means for establishing triangle congruence. In this case, yo

Dahasolnce [82]

It's not valid because there are too many unknown quantities, meaning there is not exactly one triangle that could exist for any given SSA combination.

For a visual example, see the attached image below.

It's fairly obvious that $b\neq b'$ . One is acute, the other is obtuse. In the triangle on the right, the dashed side has the same length $A$ as in the triangle on the left. This dashed side and the actual side $A$ form an isosceles triangle with congruent base angles $b'$ . The angles $b$ and $b'$ are supplementary (they add to 180 degrees), or $(b')^\circ=(180-b)^\circ$ .

Now by the law of sines, in the first triangle,

$\dfrac{\sin a^\circ}A=\dfrac{\sin b^\circ}B$

and that in the second triangle,

$\dfrac{\sin a^\circ}A=\dfrac{\sin(b')^\circ}B=\dfrac{\sin(180-b)^\circ}B$

but we also know that $\sin(180-x)^\circ=\sin x^\circ$ . Hence $\sin b'=\sin b$ .

Two different angles in this arrangement allow for two different triangles to be constructed, so having a SSA correspondence between two triangles is not enough evidence for their congruence.

8 0

3 years ago

IRINA_888 [86]

1. Answer is b.

2. Answer is c.

3. Answer is a.

3 0

4 years ago

One day a store sold 36 sweatshirts. White ones cost $10.95 and yellow ones cost $11.50. In all, $404.65 worth of sweatshirts

Hatshy [7]

Answer:

17 white sweatshirts were sold and 19 yellow sweatshirts were sold.

Step-by-step explanation:

Let w represent the number of white sweatshirts sold and y represent the number of yellow sweatshirts sold.

We can write a system of equations to represent the situation.

Since the store sold a total of 36 sweatshirts, the sum of the white and yellow sweatshirts must total 36. So:

$y+w=36$

And since each white sweatshirt cost $10.95 and each yellow sweatshirt cost $11.50 and the total profit was $404.65:

$10.95w+11.5y=404.65$

Solve the system. I'll use substitution this time (though elimination will work just as perfect). From the first equation, subtract w from both sides:

$y=36-w$

Substitute this into the second:

$10.95w+11.5(36-w)=404.65$

Distribute:

$10.95w+414-11.5w=404.65$

Simplify:

$-0.55w=-9.35$

Divide both sides by -0.55:

$w=17$

So, 17 white sweatshirts were sold.

Using the modified equation, substitute:

$y=36-(17)=19$

Therefore, 17 white sweatshirts were sold and 19 yellow sweatshirts were sold.

7 0

3 years ago

How many triangles exist with the given angle measures?

sesenic [268]

Answer:

The answer would be one triangle. it is only one triangle because the sum of the angles of any triangle have to equal 180°. So if you add all of the angles you gave us, that would equal 180°.

I hope that was the answer you were looking for.

Step-by-step explanation:

4 0

3 years ago