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
nexus9112 [7]
3 years ago
11

Can anyone help me plz?

Mathematics
1 answer:
Nat2105 [25]3 years ago
4 0
<h3>Answer: Third choice. \overline{AC} \perp \overline{BD}</h3>

==================================================

Explanation:

SAS stands for Side Angle Side. Note how the angle is between the two sides. To prove the triangles congruent with SAS, we need to know two sides and an angle between them.

We already see that BC = CD as shown by the tickmarks. Another pair of sides is AC = AC through the reflexive theorem.

The missing info is the angle measures of ACB and ACD. If we knew those angles were the same, then we could use SAS to prove triangle ACB is congruent to triangle ACD.

It turns out that the angles are congruent only when they are 90 degrees each, leading to AC being perpendicular to BD. We write this as \overline{AC} \perp \overline {BD}. The upside down T symbol meaning "perpendicular" or "the two segments form a right angle".

You might be interested in
.<br>The area of a square feild is 100 find the perimeter.<br>د<br><br>​
anastassius [24]

Answer:

40

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
2. Kirk is reading a science fiction novel. After his first 20 minutes of reading, he sees that he's read 32 pages of
coldgirl [10]
343 minutes i’m guessing
4 0
2 years ago
Read 2 more answers
Draw a set of objects where you can find a fractional part of the group using the total number of objects by using subgroups
lara31 [8.8K]
We divide the total set into several sub-sets (subgroups) that contain the exact same number of members. This way we know the number of total members by adding the number of total subsets.
5 0
3 years ago
Read 2 more answers
Name the sampling method used in each of the following situations:
elixir [45]

Answer:

a) Convenient

b) Cluster

c) Stratified

d) Systematic

e) Random

Step-by-step explanation:

Samples may be classified as:

Convenient: Sample drawn from a conveniently available pool.

Random: Basically, put all the options into a hat and drawn some of them.

Systematic: Every kth element is taken. For example, you want to survey something on the street, you interview every 5th person, for example.

Cluster: Divides population into groups, called clusters, and each element in the cluster is surveyed.

Stratified: Also divides the population into groups. However, then only some elements of the group are surveyed.

Situation a:

Asks all from a single group(sitting passengers), that is, convenint sample.

Situation b:

First she separates the students by row, then from each row, she chooses all students. So this is Cluster sampling.

Situation c:

The manager separates the stores by location, and then in each location, random customers are chosen. This is an example of Stratified sampling.

Situation d:

Marks for every fourth patron, that is, every 4th element. So Systematic sampling.

Situation e:

People chosen at random, so Random sampling.

6 0
3 years ago
All of the edges of a regular triangular pyramid have length 12. A frustum of the pyramid has height half of that of the pyramid
vlada-n [284]

Answer:

1) The volume of the frustum is 27·(√3)·h

2) The surface area the frustum is 24·h + 54·√3

Step-by-step explanation:

1) A frustum of the regular triangular prism is a portion of the triangular prism

The length of the edge of the triangle prism = 12

The area of the triangular face, A = (√3/4)·a²

∴ A = (√3/4)·12² = 36·√3

When

The volume of the triangular prism, V = A·h = (36·√3)·h

By triangle proportionality theorem, the cross sectional area of the top half of the triangular prism =  (√3/4)·6² = 9·(√3)

The volume of the top half, V₂ = 9·(√3)·h

The volume of the frustum = V - V₂ = (36·√3)·h - 9·(√3)·h = 27·(√3)·h

The volume of the frustum = 27·(√3)·h

2) The surface area of the triangular side of the frustum is given as follows;

A = 36·√3- 9·(√3) = 27·(√3)

The surface area the frustum, F_A = 2×27·(√3) + 2 ×6 ×h + 12×h = 24·h + 54·√3

The surface area the frustum = 24·h + 54·√3

4 0
3 years ago
Other questions:
  • Taylor drove from Tampa to New Orleans; her trip took her a total of 9.5 hours. Her average speed for the drive was 69 mph. For
    14·1 answer
  • Why does the government charge high taxes on cigarettes
    13·2 answers
  • The value of sqrt-9 is not -3 because
    6·2 answers
  • If triangle abc ~ triangle def and the scale factor from triangle abc to triangle def 1/5 what are the lengths
    7·1 answer
  • the distance between two numbers on the number line is 19. One of the numbers are 8. What are the two possibilities for the othe
    10·1 answer
  • The temperatures recorded at three different times on a november day in fairbanks, alaska were -2 -5 -12. Which inequality corre
    12·1 answer
  • 3v² - 54v + 240 = 0<br> Factoring
    10·1 answer
  • Find the value of X with full solutions​
    13·2 answers
  • Please help me w khan
    6·1 answer
  • Camila wanted to create a second garden to grow even more vegetables. To determine the dimensions of her second garden, she used
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!