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nordsb
1 month ago
8

Erika is writing a coordinate proof to show that the diagonals of a rectangle are congruent. She begins by assigning coordinates

to the vertices of a rectangle as shown.
Which sentence describes what Erika should do to prove that the diagonals of the rectangle are congruent?

Show that the slope of KM¯¯¯¯¯¯¯ is ba and the slope of JL¯¯¯¯¯ is −ba.
Show that the diagonals intersect at (a2, b2) .
Show that JL=KM=a2+b2−−−−−−√.
Show that JL¯¯¯¯¯ and KM¯¯¯¯¯¯¯ have the same midpoint.

Mathematics
2 answers:
Leona [12.6K]1 month ago
7 0

Answer:

Option C is the right choice.

Step-by-step explanation:

The given coordinates define a rectangle, and our objective is to show that the diagonals JL and KM are congruent.

We know that rectangles possess four right angles.

To prove the congruence of the diagonals JL and KM, we will utilize the Pythagorean theorem.

In triangle KLM, KL has a length of b units while LM has a length of a units. By applying the Pythagorean theorem \sqrt(a^{2}+b^{2})=KM

In triangle JML, JM is b units long, and LM remains a units long. We again can apply the Pythagorean theorem \sqrt(a^{2}+b^{2})=JL

Thus, we find that \sqrt(a^{2}+b^{2})=KM=LM and option C is the correct choice.

Inessa [12.5K]1 month ago
3 0

I believe it’s the final option. I’m not entirely sure, but I hope this is useful. Apologies if I’m mistaken.

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Another project on Kickstarter for an iPad stylus raised 1,253% of their goal, raising a total of $313,490 from 7,511 supporters
Svet_ta [12734]

Answer:

The initial goal was $25019.154.

Step by step Explanation:

Assuming the original goal is denoted as x.

As stated

Another Kickstarter initiative for an iPad stylus secured 1,253% of its target, accumulating a total of $313,490.

1253% can be expressed as a decimal.

= \frac{1253}{100}

= 12.53

Thus, the equation is rearranged to

12.53 × x = 313490

12.53x = 313490

x = \frac{313490}{12.53}

x = $ 25019.154

This means the initial goal stands at $25019.154.

8 0
1 month ago
Members of a school club are buying matching shirts. They know at least 25 members will get a shirt. Long-sleeved shirts are $10
babunello [11817]

Answer:

The highest number of long-sleeved shirts that can be ordered is 8

and

The lowest number of long-sleeved shirts that can be acquired is 0

Step-by-step breakdown:

Let y denote the quantity of short sleeves and x indicate the quantity of long sleeves.

According to the stipulated conditions:

Members of a school club are purchasing coordinating shirts. They understand that a minimum of 25 members will opt for a shirt.

therefore, we have;

x+y\geq 25               or

y\geq 25 -x....[1]

Given that long-sleeved shirts are priced at $10 each and short-sleeved shirts at $5 each.

Thus;

The total expense for long sleeves amounts to 10x and

the total cost of short sleeves is 5y

Moreover; the club has a budget that does not exceed $165

therefore;

10x+5y\leq 165 

 5y\leq 165 -10x or

y\leq 33-2x......[2]

By plotting the inequality functions:

Graphing equations [1] and [2] produces a maximum at the coordinates (8, 17)

thus, x= 8.

Taking the minimum value of x =0 results in y falling between 25 and 33.

consequently, the solution space is situated between the intersecting lines to the left.

In conclusion, a maximum of 8 long-sleeved shirts can be obtained, while the minimum number of long-sleeved shirts that can be bought is 0






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1 month ago
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categorize the graph as linear increasing, linear decreasing, exponential growth, or exponential decay.
zzz [12365]
This represents exponential growth
5 0
1 month ago
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Ruben has two congruent wooden dowels. He cuts one dowel in two in order to have three pieces to make a triangle. Explain why, d
Inessa [12570]
Let's apply the Pythagorean theorem to determine whether a triangle could be formed.

Assuming we have two wooden dowels each measuring 8 inches, we can break one dowel in half, resulting in two pieces of 4 inches each.

Now we have three wooden dowels with lengths of 4 inches, 4 inches, and 8 inches.

According to the Pythagorean theorem:

a² + b² = c²
4² + 4² = 8²
16 + 16 = 64
34 ≠ 64

To form a triangle, the length of the cut wooden dowel needs to exceed that of the uncut dowel.

I also visually attempted this exercise on paper, cutting according to the assumed dimensions. No triangle can be constructed with these pieces. 
4 0
1 month ago
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3. Terdapat dua bidang saling berpotongan dan tidak berhimpitan maka
Svet_ta [12734]

Kelas: VII (1 SMP)

Materi: Geometri

Kata Kunci: Garis, Sisi, Rusuk, Bidang

Pembahasan:

Suatu titik dalam geometri adalah elemen paling dasar, menunjukkan posisi yang tidak memiliki ukuran (nol panjang, nol lebar, dan nol tinggi) dan dilambangkan dengan huruf kapital.

Garis terdiri dari kumpulan titik yang memanjang tanpa batas di kedua arah.

Ruas garis adalah bagian dari garis yang terdiri dari dua titik ujung dan dinamai menurut kedua titik tersebut.

Sinar garis adalah segmen dari garis dengan hanya satu titik ujung. Dinamai berdasarkan titik ujung dan titik lain di sepanjang sinar tersebut.

Sudut terbentuk dari dua sinar yang memiliki titik ujung yang sama yang dikenal sebagai titik sudut; sinar-sinar tersebut disebut sisi-sisi sudut.

Bidang terdiri dari titik-titik tak terhingga yang membentuk permukaan datar dan meluas tanpa batas. Memiliki panjang dan lebar tak terhingga, tetapi tinggi nol. Bidang biasanya ditunjukkan dengan gambar segi empat dan dinamakan dengan huruf besar.

Rusuk adalah garis hasil pertemuan dua sisi pada bidang.

Dua bidang dapat dikatakan berpotongan jika ada garis potong antara keduanya.

Bidang sejajar apabila tidak ada garis perpotongan yang terbentuk di antara keduanya.

Dua bidang disebut berhimpitan jika semua titik terletak pada keduanya.

Mari kita analisa soal ini.

Apabila dua bidang saling bersilangan dan tidak berhimpit, maka perpotongan mereka akan membentuk garis.

Oleh karena itu, jawabannya adalah B.

Semangat!

4 0
10 days ago
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