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
Jet001 [13]
3 years ago
7

AD¯¯¯¯¯ , BD¯¯¯¯¯ , and CD¯¯¯¯¯ are angle bisectors of the sides of △ABC . CF=8 m and CD=17 m.

Mathematics
2 answers:
lara [203]3 years ago
6 0

Answer: DE= 15 m

Explanation:

Since, in \triangle CDF,

After applying, Pythagoras theorem, DF^2=CD^2-CF^2=(17)^2-(8)^2=289-64=225

Thus, DF^2=225 \Rightarrow DF=\sqrt{225} \Rightarrow DF=15 m

Again, in \triangle BDF and \triangle BDE,

\angle BED= \angle BFD ( Right angles)

BD=BD ( common edges)

\angle DBE= \angle DBF (BD makes the angle bisector of angle B.)

Thus, according to AAS condition- \triangle BDF\cong \triangle BDE

So, DE=DF (CPCT)

Therefore, DE=DF=15m⇒DE=15 m


irga5000 [103]3 years ago
3 0
To solve this you have to use the Pythagorean Theorem. 
Which is a²+b²=c²
CF,CD,and DF makes a triangle 
Substitute it in
a²+8²=17² Add
a²+64=289 Subtract 64 to get a alone
a²=225 Square root it 
a=15


You might be interested in
Round 6.081 to the nearest hundredth
konstantin123 [22]

Answer: 6.08 or 6.080. Whatever

Step-by-step explanation:

The hundredths is where the 8 is. If u look to the right of the 8, is a one. So u keep the hundredths place the same.

3 0
3 years ago
Read 2 more answers
A map of a forest uses a scale of 1 inch = 15 miles. The dimensions of the map are 8 inches by 14.5 inches. What is the actual a
Bad White [126]

The dimension from 8 inches to actual size is 8 * 15 = 120. 14.5 inches to actual size is 14.5 * 15 = 217.5.

Then, you multiply 120 to 217.5 to get 26100 square miles.

The answer is D.

8 0
3 years ago
Read 2 more answers
Multiple choice question
galina1969 [7]
The answer is B. slope 0 intercept -5
4 0
3 years ago
Read 2 more answers
Name the figure. Select all answers that apply.
elena-s [515]

Answer:

The answer is Plane P

Step-by-step explanation:

The reason for the answer is because a closed, two-dimensional or flat figure is called a plane shape. Different plane shapes have different attributes, such as the numbers of sides or corners. A side is a straight line that makes part of the shape, and a corner is where two sides meet.

8 0
3 years ago
Find the coordinates of the vertices of the figure formed by each system of inequalities.
siniylev [52]

Answer:

D(1, –5), (7, 1), (–11, 7)

Step-by-step explanation:

The given inequalities are:

y + x ≥ –4

y ≥ x – 6

3y + x ≤ 10

We graph the inequalities as shown in the attachment.

The coordinates of the vertices of the figure formed by the given system of inequalities are:

(1, –5), (7, 1), (–11, 7)

The correct choice is D.

6 0
3 years ago
Other questions:
  • Let R be a set of nine distinct integers. Six of the elements of the set are 2, 3, 4, 6, 9, and 14. Find the number of possible
    7·1 answer
  • Help me with part A<br>please
    9·2 answers
  • A study was made to find out if those who drank tea consumed more water than those who did not. The study concluded that those w
    7·2 answers
  • The volume of a cube is 400 m3. Which statements are true about the same cube measured in cubic centimeters? Choose all answers
    12·1 answer
  • Beth is making fruit salad. She adds 3 grapes for every 2 strawberries. If she uses 16 strawberries, how many grapes will she us
    12·2 answers
  • A person can see the top of a building at an angle of 65°. The person is standing 50 ft away from the building and has an eye le
    13·1 answer
  • What is 2 times 1000000​
    14·2 answers
  • Using the figure at the right, find the height of the dinasaur.​
    13·1 answer
  • What type of function does the table show?*
    11·1 answer
  • 4) Increase 340g by 20% ​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!