1. Using a protractor, measure and write down the angles.
1. 1. Using a protractor, measure and write down the angles.
Question(Pertanyaan):
Where is the picture?
(Mana gambarnya?)
2. Two lines that create right angles are called............lines
Jawaban:
perpendicular line..........
3. Sum of two angles 95 difference 25 angles
Jawaban:2x=95-25=70. ×=70/2=35.so 3 angles are 35,60,85. Yes D is correct answer as 60+35=95 and 60 _35=25 . This discussion on The sum of the two angles in a triangle is 95° and their difference is 25°.
Penjelasan: maaf kalo salah
4. 3. In the diagram, the sizes of two angles are marked.a What other angles are 105°?b What other angles are 75°?
Jawab:
a) 105⁰ = q⁰, r⁰, u⁰
b) 75⁰ = p⁰, s⁰, t⁰
Penjelasan dengan langkah-langkah:
105⁰ opposite with q⁰ so it's equal
105⁰ have same direction with r⁰ so it's equal
r⁰ opposite with u⁰ so it's equal too
For 75⁰ the explanation it's the same
5. It is given that A and B are acute angles such that sin(A+B)=7/8 and cosAsinB=1/4. Without using a calculator, find the value of the question. What is (2tanA)/(3tanB)
Penjelasan dengan langkah-langkah:
sin (A + B) = sin A cos B + cos A sin B
7/8 = sin A cos B + 1/4
∴ sin A cos B = 7/8 - 1/4
sin A cos B = 5/8
the question :
(2 tan A)/(3 tan B) = ?
the answer :
(2 tan A)/(3 tan B) = (2 sin A/ cosA) / ( 3 sinB/cosB)
= 2/3 (sin A cos B / cos A sin B)
∵ sin A cos B = 5/8
cos A sin B = 1/4
= 2/3 { (5/8) / (1/4) }
= 2/3 { 5/2 }
= 5/3
6. 1. In the figure, AB || CD. (a) List down (1) two pairs of equal corresponding angles, (ii) two pairs of equal alternate angles, (iii) two pairs of interior angles which are supplementary. (b) Is BWQ = AXR? Explain your answer. c) Is the sum of DYP and CZR equal to 180? Explain your answer.
Penjelasan dengan langkah-langkah:
Kita translite ke Bahasa Indonesia dulu
Pada gambar, AB || CD.
(a) Daftar ke bawah
(1) dua pasang sudut yang bersesuaian sama besar,
(ii) dua pasang sudut yang sama besar,
(iii) dua pasang sudut dalam yang bersuplemen.
(b) Apakah BWQ = AXR? Jelaskan jawabanmu.
c) Apakah jumlah DYP dan CZR sama dengan 180? Jelaskan jawaban Anda
Garis dan SudutJawaban
A.
(i) 2 Pasang sudut yang bersesuaian sama besar adalah
< W = < X
< Y = < Z
(ii) 2 Pasang sudut yang sama besar
< W = < X
< Y = < Z
(iii) 2 Pasang sudut dalam yang tambahan
< YWX dan < ZXW
< WYZ dan < XZY
B. BWQ = AXR
Tidak sama karena < BWQ lebih landai dibandingkan dengan < AXR yang lebih lancip
C. DYP + CZR = 180⁰
Ya, karena < DYP dan < CZR saling berhadapan maka jumlah kedua sudut adalan 180⁰
Detail Jawaban
Mapel: Matematika
Kelas: 7 / VII SMP
Materi : Garis dan Sudut
Kode Kategorisasi: -
Kata Kunci: Garis dan Sudut
Demikian
Semoga membantu dan bermanfaat!
7. aku ada pertanyaan matematika nih tp pake bahasa inggris . ada yag bisa bantu gk ? ini soalnya 1. the sum of the three angles of a triangle is 180degree. the sum of two of the angles is equal to the third angle and the difference of the two angles is equal to
jumlah dari tiga sudut segitiga adalah 180 derajat . jumlah dua sudut sama dengan sudut ketiga dan perbedaan dari dua sudut sama dengan...
misal sudutnya : a + b + c = 180
a + b = c
a + b - c = 0
eliminasi diperoleh
2c = 180
c = 90
a + b = 90
a = 90 - b
8. Find all the angles between -360° and 180° such that sin x =1/2
Jawaban:
rate yaa
Penjelasan dengan langkah-langkah:
sinx =1/2
sin60=sin120=1/2
karena 360 itu searah jarum jam
maka
sin-360+30=sin-360+150=1/2
sin-330=sin-210=1/2
maka
sudutnya adalah ={-330,-210,60,120}
9. One fifth of the sum of two angles is 24 degree. Half of their difference is 14 degree. Find the two angles
74⁰ and 46⁰
cara dan jawabannya seperti di foto ya.
semangat belajar....
10. given thay AOD=98° and BCD=110° then the measure of ABD is
ABD = ½AOD
ABD = ½ × 98°
ABD = 49°
11. Apa yang dimaksud dengan: - Supplementary Angles - Complementary Angles - Corresponding Angles - Alternate interior Angles - Alternate exterior Angles - Opposite Angles
- sudut suplemen atau sudut yang berpelurus Sifat : Kalo dijumlahkan hasilnya 180 derajat - sudut komplemen atau berpenyiku Sifat : Kalo dijumlahkan hasilnya 90 derajat - saya gatau corresponding, maaaaf - sudut dalam bersebrangan Sifat : Besarnya sama - sudut luar bersebrangan Sifat : Besarnya sama - sudut bertolak belakang Sifat : Besarnya sama Maaf kalau salah
12. A rhombus has diagonals of length 8 cm and 11 cm. Find the measure of the smaller angles of the rhombus.
Dua buah diagonal belahketupat saling berpotongan di sebuah titik yang berada tepat di tengah masing-masing diagonal.
Sudut yg lebih kecil dari belahketupat ( β ), adalah sudut yg bersinggungan dengan diagonal yg lebih panjang.
Sehingga dengan perbandingan trigonometri didapatkan :
tan ½β = ½ x 8 / ½ x 11
tan ½β = 4 / 5,5
tan ½β = 0,7272727273
½β ≈ 36° (nilai pembulatan)
==> β = 72°
13. Given measure of an angle is 2/3 of it's complimentary angle. The measure of that angle is
Let [tex]\alpha[/tex] be an angle so that [tex]\beta[/tex] is its complementary angle.
We know that:
[tex]\alpha + \beta = 90^o[/tex]
Plugging in [tex]\alpha = \frac{2}{3} \beta[/tex] we get:
[tex]\frac{2}{3} \beta + \beta = 90^o \\ \frac{5}{3}\beta = 90^o \\ \beta = 54^o[/tex]
So our final answer is:
[tex]\alpha = \frac{2}{3}\beta = \frac{2}{3}(54^o) = 36^o[/tex]
14. Draw a labeled diagram to show two linked half-cells that could be used to measure the standard cell potential!
Jawaban:
galvanic
Penjelasan:
jadikan jawaban tercerdas
15. the sum of three angles of triangle of 180 deg. the sum of two of the angles is equal to the third angle and the difference of the two angles is equal to 2/3 the third angles find the angles of this triangle?
suppose that :
x = first angle
y = second angle
z = third angle
The sum of three angles of triangle of 180°
So :
x + y + z = 180
The sum of two of the angles is equal to the third angle
So :
x + y = z
The difference of the two angles is equal to 2/3 the third angles
So :
x - y = (2/3) z
subtitute x + y = z
x + y + z = 180
z + z = 180
2z = 180
z = 180/2
z = 90
x + y = z
x + y = 90
x - y = (2/3) z
x - y = (2/3) (90)
x - y = 60 >>> x = 60 + y
subtitute x = 60 + y
x + y = 90
60 + y + y = 90
60 + 2y = 90
2y = 90 - 60
2y = 30
y = 30/2
y = 15
x = 60 + y
x = 60 + 15
x = 75
We got :
x = 75
y = 15
z = 90
So, the angles are 75°, 15°, and 90°
16. Three angles of a quadrilateral are 60°,80°and 110°. How big is the fourth angle??
Sum of the angles of quadrilateral should be 360°
let the fourth angle x
therefore,
60° + 80° + 110° + x = 360°
x + 250° = 360°
x = 360° - 250°
x = 110°
17. there are two ways that we can measure the plant growth. they are
ini di translate gk?
Penjelasan:
kalau d translet
Question:
they are two ways that we can measure the plant growth. they are
Translate:
Mereka adalah dua cara kita dapat mengukur pertumbuhan tanaman. mereka
Answer:
I dont now about that sorry(╥﹏╥)
Penjelasan:
Apakah di translate??
18. if the measure of <BOC = 80 derajat. find the measure og <AOC !
measure of <AOC
=180°-80°
=100°
maaf jika salah :)
19. the quadrilateral has two pairs of equal sides and four right angles(digambar)the quadrilateral has no equal sides and no equal angles(digambar juga)mohon cepet dijawab ya yg ngasal aku report
maaf kalau kurang rapih. Btw, kyknya lingkaran juga bisa buat yg kedua.
maaf kalau salah :)
20. What is the name of a shape that has 4 equal sides and 4 door angles? *
Jawaban:square
Penjelasan:
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