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
zubka84 [21]
3 years ago
10

Triangle def has vertices d(2,-5) e(6,-1) and f(5,6) verify that def is isosceles

Mathematics
1 answer:
goldfiish [28.3K]3 years ago
4 0
To prove that the given triangle is an isosceles, two of its sides must have equal lengths.

Between D(2,-5) and E(6,-1):
d = √(6 - 2)² + (-1 - ⁻5)² = 4√2

Between E(6,-1) and F(5,6):
d = √(5 - 6)² + (6 - ⁻1)² = 5√2

Between D(2,-5) and F(5,6)
d = √(5 - 2)² + (6 - ⁻5)² = √130

<em>Since there are no equal lengths, the triangle is NOT an isosceles triangle.</em>

The bisector of angle F is a line segment from vertex F to the midpoint of line DE.

Midpoint: x = (2+6)/2 = 4; y = (-5+-1)/2 = -3
The midpoint is at (4,-3).
The equation of the line follows the point-slope formula:
y - y₁ = [(y₂ - y₁)/(x₂ - x₁)](x - x₁)
Substituting using points (5,6) and (4,-3)
y - 6 = [(⁻3 - 6)/(4 - 6)](x - 5)
y - 6 = (9/2)(x - 5)
2(y - 6) = 9(x - 5)
2y - 12 = 9x - 45
<em>2y - 9x = -33 </em>

You might be interested in
QUESTION 8 The probability of concluding that assignable variation exists when only random variation is present is: (I) the prob
Juliette [100K]

Answer:

I, II, and IV

Step-by-step explanation:

(I) the probability of a Type I error.

(II) known as the alpha risk.

(IV) the sum of probabilities in the two tails of the normal distribution.

3 0
3 years ago
The function h(x) is given below.
zavuch27 [327]

The inverse function will be h⁻¹(x) = {(–5, 3), (–7, 5), (–9, 6), (–12, 10), (–16, 12)}. Then the correct option is B.

<h3>What is inverse of a function?</h3>

Suppose that the given function is

f:X → Y

Then the inverse of the considered function will be

f⁻¹: Y → X

The function h(x) is given below.

h(x) = {(3, –5), (5, –7), (6, –9), (10, –12), (12, –16)}

Then the coordinate of the inverse function gets swapped.

h⁻¹(x) = {(–5, 3), (–7, 5), (–9, 6), (–12, 10), (–16, 12)}

Then the correct option is B.

Learn more about inverse function here:

brainly.com/question/19425567

#SPJ1

8 0
2 years ago
Delia earns $10.50 per hour working at a restaurant. On Friday she spent 1 3/4 hours cleaning . 2 1/3 hours doing paperwork, and
DIA [1.3K]
Friday:
She earns $10.5×1 3/4=$18.375 for cleaning, 10.5×2 1/3=$24.5 for doing paper work, 10.5×1 5/12=$14.875 for serving costumes. As a result, Delia earns $57.75 in total. Hope it help!
6 0
3 years ago
The average height of a 13 year old male in the U.S. is 60 inches, with a standard deviation of 2 inches. The average weight of
Romashka [77]

Since the average height is 60 inches and its deviation is 2 inches, one deviation to the right (or higher) is 62 inches (60 + 2). Two deviations is 64 inches, three deviations is 66 inches, and four deviations is 68 inches.


Since the average weight is 100 pounds and its deviation is 5 inches, we repeat the process from finding heights to get to 115 pounds. That takes three deviations.


The MORE deviations away, the more unusual it is. So the height (4 deviations) is more unusual than the weight (3 deviations).

5 0
2 years ago
Read 2 more answers
(PLEASE HELP!!!Which number line can be used to find the distance between (-1,2) and (-5,2)?
KIM [24]

Answer:

I think it is the first number line

Step-by-step explanation:

I think it is this one because it is the only one that shows the placement of -1 and -5. I am sorry if the answer is wrong.

6 0
3 years ago
Other questions:
  • Lin,Mac, and star spend 6$ on supplies to set up a lemonade stand they sell 21$ worth of lemonade they are going to share the mo
    13·1 answer
  • 1. A sample is being chosen for a survey to find out how people feel about adding more stop signs near a school. Which group wou
    5·1 answer
  • One number exceeds another by 99. the sum of the numbers is 6565. what are the? numbers?
    5·1 answer
  • What is a integer????
    7·2 answers
  • A glass of water was one eighth of a liter. How many glasses would it take to fill up a 3 liter jug
    6·1 answer
  • Two boys are trying to solve 17+36=?
    9·1 answer
  • The graphs below have the same shape. What is the equation of the blue<br> graph?
    8·2 answers
  • Find the slope of the pair of points. (-8, -1) (-18, 2)
    12·2 answers
  • write an equation of the line that passes through the given point is a parallel and B perpendicular to the given line (4,3)​
    8·1 answer
  • I will mark brainliest
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!