1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Gnom [1K]
3 years ago
6

find the area of a rhombus whose one side is equal to 10 cm and the length of one of the diagonals is 12 cm

Mathematics
1 answer:
White raven [17]3 years ago
8 0

Answer:

10 x 12 = 120cm^2

Step-by-step explanation:

base times height

10cm     x     12cm  

120cm^2

(120cm squared)

You might be interested in
You can perform 10 push ups in 25 seconds how many can you do in 2 minutes
Whitepunk [10]

not the GREATEST at math but try 50

6 0
3 years ago
1. Find the cost of levelling the ground in the form of a triangle having the sides 51 m, 37 m and 20 m at the rate of ₹ 3 per m
Flauer [41]

1. Find the cost of levelling the ground in the form of a triangle having the sides 51 m, 37 m and 20 m at the rate of ₹ 3 per m².

a = 51 m, b = 37 m, c = 20 m

semiperimeter:  p = (51+37+20):2 = 54 m

Area of triangle:

A=\sqrt{p(p-a)(p-b)(p-c)}\\\\A=\sqrt{54(54-51)(54-37)(54-20)}\\\\A=\sqrt{54\cdot3\cdot17\cdot34}\\\\A=\sqrt{9\cdot2\cdot3\cdot3\cdot17\cdot17\cdot2}\\\\A=3\cdot2\cdot3\cdot17\\\\A=306\,m^2

Rate:  ₹ 3 per m².

Cost:  ₹ 3•306 = ₹ 918

2. Find the area of the isosceles triangle whose perimeter is 11 cm and the base is 5 cm.

a = 5 cm

a+2b = 11 cm  ⇒  2b = 6 cm   ⇒  b = 3 cm

p = 11:2 = 5.5

A=\sqrt{5.5(5.5-3)^2(5.5-5)}\\\\ A=\sqrt{5.5\cdot(2.5)^2\cdot0.5}\\\\ A=\sqrt{11\cdot0.5\cdot(2.5)^2\cdot0.5}\\\\A=0.5\cdot2.5\cdot\sqrt{11}\\\\A=1.25\sqrt{11}\,cm^2\approx4.146\,cm^2

3. Find the area of the equilateral triangle whose each side is 8 cm.

a = b = c = 8 cm

p = (8•3):2 = 12 cm

A=\sqrt{12(12-8)^3}\\\\ A=\sqrt{12\cdot4^3}\\\\ A=\sqrt{3\cdot4\cdot4\cdot4^2}\\\\A=4\cdot4\cdot\sqrt{3}\\\\A=16\sqrt3\ cm^2\approx27.713\ cm^2

4. The perimeter of an isosceles triangle is 32 cm. The ratio of the equal side to its base is 3 : 2. Find the area of the triangle.

a = 2x

b = 3x

2x + 2•3x = 32 cm  ⇒ 8x = 32 cm   ⇒  x = 4 cm  ⇒ a = 8 cm, b = 12 cm

p = 32:2 = 16 cm

A=\sqrt{16(16-8)(16-12)^2}\\\\ A=\sqrt{16\cdot8\cdot4^2}\\\\ A=\sqrt{2\cdot8\cdot8\cdot4^2}\\\\ A=8\cdot4\cdot\sqrt2\\\\ A=32\sqrt2\ cm^2\approx45.2548\ cm^2

8 0
3 years ago
X=5-3Y<br> X=2Y-10<br> Whats the answer
prohojiy [21]
X = 5 - 3y
x = 2y - 10

5 - 3y = 2y - 10
<u>  + 3y + 3y        </u>
       5 = 5y - 10
  <u>+ 10        + 10</u>
     <u>15</u> = <u>5y</u>
      5      5
       3 = y
x = 2y - 10
x = 2(3) - 10
x = 6 - 10
x = -4
(x, y) = (-4, 3)
6 0
3 years ago
Read 2 more answers
When placed end to end, three red rods are 2 cm longer than than 2 blue rods. Three blue rods are 2 cm longer than four red rods
Oxana [17]

Answer:

Red = 10 cm, blue = 14 cm

Step-by-step explanation:

<em>Let the length of each red rod be </em><em>r </em><em>and each blue rod be </em><em>b</em>

<u>Then we have:</u>

  • 3r - 2b = 2
  • 3b - 4r = 2

<u>Multiply the first equation by 3 and the second one by 2:</u>

  • 9r - 6b = 6
  • 6b - 8r = 4

<u>Add the equations to eliminate one of variables:</u>

  • 9r - 8r = 6 + 4
  • r = 10 cm

<u>Find the value of b:</u>

  • 3*10 -2b = 2
  • 30 - 2 = 2b
  • 2b = 28
  • b = 14 cm

5 0
3 years ago
Given sin 0 and angle 0 is in Quadrant II, what is the exact value of cos 0 in
Anna007 [38]

sin = 3/7

1 = sin²0 + cos²0

cos²0 = 1 - 9/49

cos²0 = 40/49

cos0 = √(40) / 7

since its in Quadrant 2 the sin is positive and cos is negative

cos0 = - √(40) / 7

4 0
2 years ago
Other questions:
  • What are the last non-zero digits of 2015! ?
    10·1 answer
  • Ralph Jordan recently bought a new lawnmower for $228. if he paid 6% sale tax on the lawnmower,what was the total cost of the la
    5·2 answers
  • Please help me with my math test
    7·1 answer
  • A group of random people were polled about whether they prefer to communicate using text messages or by phone calls. The results
    14·1 answer
  • I NEED HELP ITS KINDA EASY BUT NOT FOR ME
    15·2 answers
  • What is a one-step equation?
    6·1 answer
  • The total number of degrees in the center is 360°. If all five vertex angles meeting at the center are congruent, what is the me
    15·1 answer
  • Hey guys pls help asap ​
    6·2 answers
  • 5. Find the equation of the line that goes through the points (4,7) and (-2,-5)
    6·1 answer
  • I need help with this please!
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!