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
fiasKO [112]
3 years ago
14

Triangle ABC had a perimeter 18 cm

Mathematics
1 answer:
Alex3 years ago
4 0

Step-by-step explanation:

what is the main condition the lengths of the sides of a right-angled triangle have to fulfill ?

Pythagoras !

c² = a² + b²

c is the Hypotenuse (the baseline opposite of the 90 degree angle), a and b are the so-called legs (the sides enclosing the 90 degree angle).

only if there is a combination of the sides, for which the Pythagoras equation is true, do we have a right-angled triangle. otherwise not.

we also know CA = 18 - 7 - 3 = 8 cm

so, let's try

8² = 7² + 3²

64 = 49 + 9 = 58 wrong

7² = 8² + 3²

49 = 64 + 9 = 73 wrong

3² = 8² + 7²

9 = 64 + 49 = 113 wrong

so, there is no combination, where the Pythagoras equation is true, so it is NOT a right-angled triangle.

You might be interested in
(2y + 9)(3y - 1) = 5y2 + 25y - 9
Vikki [24]

Answer:

y1= 0, y2= 5/3

Step-by-step explanation:

Remove the parentheses and multiply

then cancel the equal terms

collect the lie terms

move the variables to one side

divide both sides by two

split into possible cases

then solve the equation to get

y= 0 and

y= 5/3

7 0
2 years ago
Is due today Help!!! Algebra ll
guapka [62]

-7x-9y=-8

5x+6y=4

-35x-45y=-40

35x+42y=28

-3y=-12

y=4

5x+6(4)=4

5x+24=4

5x=-20

x=-4

(-4,4)

Hope this helps.

頑張って!

7 0
3 years ago
Anyone know this I’m stuck?
alexandr1967 [171]

Answer:

The answer is B.

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
It is impossible to create a square pyramid by rotating a shape about an axis because its base is not ________.
natta225 [31]
It is impossible because it's base is not circular. A solid of revolution is <span>obtained by rotating a </span>plane curve<span> around some </span>straight line, that is, <span>the </span>axis of revolution that lies on the same plane. The closest to a square pyramid applying this concept is by rotating a right triangle around the opposite or adjacent side (the axis), but the shape that you get is a straight circular cone. 
7 0
2 years ago
A student wrote a number pattern such that each number is 3 more that 4 times the previous number. What is the sixth term in the
Nesterboy [21]
Start with 1.
1st number = 1
2nd number = 1 * 4 + 3 = 7
3rd number = 7 * 4 + 3 = 31
4th = 31 * 4 + 3 = 127
5th = 127 * 4 + 3 = 511
Which means the 6th = 511 * 4 + 3, which is 2047.
4 0
3 years ago
Read 2 more answers
Other questions:
  • Solve the equation and enter the value of x below 2(x+6)=-10
    11·1 answer
  • 50% of what number is 43
    9·2 answers
  • The answer to this problem please
    7·1 answer
  • If f(x) = 3x - 12, what is f(2)?
    10·1 answer
  • Find the next three terms of each sequence
    9·1 answer
  • The function y = 3x + 42 models the average number of dogs at an animal shelter, where x is the number of days after July 1. The
    9·1 answer
  • Please help.
    14·2 answers
  • 2x + 3y = 6<br> Solve for y
    11·1 answer
  • Find an equation of a line parallel to the given line and contains the given point. Write the equation in slope-intercept form.
    11·2 answers
  • patsy can decorate 3 1/2 cupcakes in 1/4 hour at this rate how many cupcakes can patsy decorate in 1 hour
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!