What is the area of a parallelogram whose bases are 9 cm long, whose opposite sides are 4 cm long, and whose altitude is 3 cm?
1. What is the area of a parallelogram whose bases are 9 cm long, whose opposite sides are 4 cm long, and whose altitude is 3 cm?
Jawaban:
Berapakah luas jajaran genjang yang panjang alasnya 9 cm, yang sisi-sisinya panjang 4 cm, dan yang ketinggiannya 3 cm?
2. In the figure, ABCD is a parallelogram, CDF is a right-angled triangle, and CGF and DEF are straight lines. If the area of ACDF is 60 cm and 2CG = GF, find the area of the parallelogram ABCD.
Penjelasan dengan langkah-langkah:
2CG = CF
Area of ABCD = CD • CG
Area of CDF = (CD • CF)/2 = 60 cm²
Area of CDF = (CD • 2CG)/2 = 60 cm²
Area of CDF = CD • CG = 60 cm² = Area of ABCD.
So, the area of ABCD is 60 cm²
3. ayo bantu poinnya banyakk In the figure, ABCD is a parallelogram, and AFE and BCE are straight lines. If the area of the parallelogram is 80 cm, BC = CE and DF = FC, find the area of(i) AABE(ii) AADF.
Penjelasan dengan langkah-langkah:
(i) area of ∆ ABE is equal with ABCD
= 80cm²
(ii) area of ∆ ADF = ¼ x 80 = 20cm²
Jawaban:
(i)= 80cm²
(ii)= 20cm²
Penjelasan dengan langkah-langkah:
mohon maaf jika ada yang kesalahan
4. The figure below shows a big rectangle made up of 30 small rectangles whose area is 4 cm² each. Find the area of the shaded region
Jawaban:
Maaf ya, pertanyaannya kurang lengkap. Mana gambarnya ("The figure below...")?
5. find the area of the pentagon
Jawaban:
cara dan jawabannya seperti di foto ya
semangat belajar
semoga membantu;)
6. the area of a rectangle is equal to the area of a square whose sides have length 8 cm. if the width of the rectangle = 4cm , then find the length of the rectangle
Jawaban:
40 cm
Penjelasan dengan langkah-langkah:
sides have length 8 cm : panjang sisi 8 cm
width rectangle = 4 cm : lebar persegi panjang itu 4 cm
L = p × l ➡️ Bahasa Indonesia
l × w = l × l
l × 4 = 8 × 8
4l = 64
l = 64/4
l = 16 cm
Find the length : 2(l + w)
= 2(16 + 4)
= 2(20)
= 40 cm
7. Find the area of the figure
Jawaban:
dik.
persegi panjang
panjang p = 10 m
lebar l = 6 m
segitiga
alas a = lebar persegi panjang = 6 m
tingg t = 7 cm
luas persegi panjang
= p x l
= 6 m x 10 m
= 60 m²
luas segitiga
= /2 x alas x tinggi
= 1/2 x 6 x 7
= 21 cm²
luas gabungan = 60 m² + 21 m² = 81 m²
8. In the figure, ABCD is a parallelogram and AED is a right-angled triangle. If the area of AAED is 25 cm², and the lengths of AE and EB are in the ratio 1 : find the area of the trapezium BCDE.
Penjelasan dengan langkah-langkah:
apakah ada gambarnya soalnya kalau tidak ada gambar nya saya tidak bisa Jawab
9. w,x,y and z are the midpoints of the four sides of parallelogram ABCD. P is a point on the line segment YZ. What percent of the area of parallelogram ABCD is triangle PXW?
luasnya berarti 1/8 dari jajargenjang
atau 12,5% dari luas jajargenjang
10. Find the synonyms of the words from the text listed below. The bold typed words are the examples for you done for you.
Jawaban:
That's it my answers
I JUST DO IT BY MY SELF
11. the sides of parallelogram ABCD are represented as shown . find DA
Penjelasan dengan langkah-langkah:
Sifat jajar genjang:
AB \\ DC dan AD \\ BC sehingga AB = DC dan AD = BC
AB = DC
2x + 12 = 5x - 18
3x = 30
x = 10
karena AD = BC maka
AD = 3x - 6
= 3(10) - 6
= 24
12. Find the area of the shaded part of the figure.
Jawaban:
81
Penjelasan dengan langkah-langkah:
15*15=225
12*12=144
225-144=81
13. 3 Two vertices of a rectangle, ABCD, are A(-6, -4) and B(4, -8). Find the gradient of CD and the gradient of BC.
Two vertices of a rectangle, ABCD, are A(–6, –4) and B(4, –8).
The gradient of CD is –2/5 (or –0.4).The gradient of BC is 5/2 (or 2.5).Penjelasan dengan langkah-langkah:
On rectangle [tex]ABCD[/tex]:
[tex]CD \parallel AB[/tex], and [tex]BC \perp AB[/tex], or [tex]BC\perp CD[/tex].Thus, the gradient of [tex]CD[/tex] equals the gradient of [tex]AB[/tex], and the gradient of [tex]BC[/tex] equals –1/(the gradient of [tex]AB[/tex]) or –1/(the gradient of [tex]CD[/tex])
Solving them:
[tex]\begin{aligned}m_{CD}&=m_{AB}\quad\because CD\parallel AB\\&=\frac{y_B-y_A}{x_B-x_A}\\&=\frac{-8-(-4)}{4-(-6)}\\&=\frac{-4}{10}\\\therefore\ m_{CD}&=\boxed{\,\bf{-}\frac{2}{5}\,}\end{aligned}[/tex]
[tex]\begin{aligned}m_{BC}&=\frac{-1}{m_{AB}}\quad\because BC\perp AB\\&=\frac{-1}{m_{CD}}\quad\because BC\perp CD.\ {\sf too.\ }\\&=\frac{-1}{\left({-}\dfrac{2}{5}\right)}\\&=-1\times\left(-\frac{5}{2}\right)\\\therefore\ m_{BC}&=\boxed{\,\bf\frac{5}{2}\,}\\\end{aligned}[/tex]
[tex]\blacksquare[/tex]
14. Mohon bantuannya:" Find the synonyms of the words from the text listed below.
Jawaban:
1.undergo = done
2.computer = calculate
3.speed up = accelerate
4.operate = work
5.distributed= spread
6.connected= linked
7.artificial =Immitation
8.consist of =comprise
9.conventional=traditional
10.accomplished= experience
11.mimic =immitate
12.desired = prefered
Penjelasan:
semoga membantu☺
1.undergo = done
2.computer = calculate
3.speed up = accelerate
4.operate = work
5.distributed= spread
6.connected= linked
7.artificial =Immitation
8.consist of =comprise
9.conventional=traditional
10.accomplished= experience
11.mimic =immitate
12.desired = prefered
15. The circular portions of the following figures are semicircles. Find the perimeter and area of each of the following figures.
Penjelasan dengan langkah-langkah:
(a)
Luas = 3x5/2 + 3,14 x 2²/2 = 7,5 + 6,28 = 13,78 m²
Keliling = 3+5 + 3,14x2 = 8 + 6,28 = 14,28 m
(b) Luas = 3,14 x 9/2 + 3,14 x 4,5
= 3,14 x 9 = 28,26 cm²
Keliling = 3,14 x 18/2 + 3,14 x 9
= 3,14 x 18
= 56,52 cm
Penjelasan dengan langkah-langkah:
a.
Luas = 3 × 5/2 + 3,14 × 2²/2 = 7,5 + 6,28 = 13,78 m²
keliling = 3 + 5 + 3,14 × 2 = 8 + 6,28 = 14,28 m
b.
Luas = 3,14 × 9/2 + 3,14 × 4,5 = 3,14 × 9 = 28,26 m²
keliling = 3,14 × 18/2 + 3,14 × 9 = 3,14 × 18 = 56,52 cm
16. a. find the perimeter of the shapeb. find the area of the shape
Jawaban:
the working and the answer are shown in the pic.
happy learning
#first
17. find the synonyms of the words from the text listed below. mohon bantuannya :)
Operate=work
Connected=linked
Accomplished=done
Compute=calculate
Speed up=accelerate
Maaf saya hanya tau sejauh ini
18. the area of a rectangle is equal to the area of a square whose sides have length 8 cm. if the width of the rectangle = 4cm , then find the length of the rectangle
square = s.s
rectangle = w.l
s.s = w.l
8.8 = w.4
64 = w.4
64/4 = w
w = 16 cm
19. Worked Example Volume of prism Calculate the volume of the prism, whose base is a parallelogram. 5 6 m 1 m 2 m *Solution Base area = area of parallelogram = 2 x 1 = 2 m Volume of the prism = base area x height = 2 x 6 = 12 m Problem-so Do not confuse height of a para the base area ar a prism.
Jawab:
volume prisma (volume of prism) = alas (base area) * tinggi (height)
base area?
2 * 1 = 2
volume = 2 * 6 = 12 m^3
20. find the area of the shaded partarea of figure
[tex] \frac{1}{4} \times \frac{22}{7} \times 14 \times 14 + 2 \times \frac{1}{2} \times \frac{22}{7} \times 7 \times 7 \\ \\ 154 + 154 \\ \\ 308 \: {cm}^{2} [/tex]
Tidak ada komentar:
Posting Komentar