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Alexandra [31]
3 years ago
13

PLEASE HELP?? If arc AB = 70°, how many degrees are in ∠ ADB? A) 35° B) 50° C) 70° D) 110°

Mathematics
1 answer:
defon3 years ago
3 0

Answer:

∠ADB=35°

Step-by-step explanation:

Given arc AB = 70°.

we have to find the angle ∠ADB

Here, Angle subtended by arc AB at O is ∠AOB = 70°

By the theorem,

The angle subtended by an arc at the center is double the angle subtended by it at any point on the remaining part of the circle.

∴ ∠AOB=2(∠ADB)

⇒ \angle ADB=\frac{1}{2}\angle AOB=\frac{1}{2}70^{\circ}= 35^{\circ}

hence, angle subtended at the circumference is 35°




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3) There were 35 children and 10 adults at a barbeque.
Mila [183]

Answer:

3. a. 10:35= 2:7

b.35:45=7:9

c.40:50=4:5

7 0
3 years ago
ASAP!!!!!!!!! PLEASE help me with this question! This is really urgent! No nonsense answers please.
Cloud [144]
<h3>Answer: C) increase from 45 degrees to 50 degrees</h3>

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

Explanation:

Let's calculate the angle B based off the arcs CDF and GHJ

B = (far arc - near arc)/2

B = (arc CDF - arc GHJ)/2

B = (130 - 40)/2

B = 90/2

B = 45

----------

Now let's change GHJ to 30 degrees, while keeping the other arc the same.

B = (far arc - near arc)/2

B = (arc CDF - arc GHJ)/2

B = (130 - 30)/2

B = 100/2

B = 50

Angle B has increased from 45 degrees to 50 degrees.

7 0
3 years ago
How many times does 61 go into 340
TiliK225 [7]
I think maybe about 5 times
4 0
2 years ago
Read 2 more answers
What is the value of x
timama [110]

Answer:

The answer to your question is:  x = 27

Step-by-step explanation:

The are vertical angles, so they measure the same:

                          4x + 7 = 5(x - 4)

                          4x + 7 = 5x - 20                       Expanding

                          4x - 5x = -20 - 7                       Simplify like terms

                          -x = -27

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3 0
3 years ago
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There are multiple chickens and rabbits in a cage. There are 72 heads and 200 feet inside the cage. How many chickens are in the
svetoff [14.1K]
Represent
r=number of rabbits
c=number of chickens
1 rabbit=4 feet and 1 head
1 chicen=2 feet and 1 head

rabbits head+chicen heads=72
1r+1c=72
feet=200
4 times r+2 times c=200
4r+2c=200
divide both sides by 2
2r+c=100


we have
r+c=72
2r+c=100
make first equation negative and add to second equation

-r-c=-72
<u>2r+c=100 +
</u>1r+0c=28

r=28
subsitute
r+c=72
28+c=72
subtract 28
c=44

44 chickens and 28 rabits
<u />
4 0
2 years ago
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