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
shutvik [7]
3 years ago
5

A and B are centres of two circles of radii 8 cm and 1 cm such that AB =13 cm and angle ACB =90 degree where C is the centre of

another circle which touches the above two circles . Find the area of the circle with centre C
Mathematics
1 answer:
Artyom0805 [142]3 years ago
7 0

Answer:

50.28 sq. cm.

Step-by-step explanation:

A and B are centers of two circles of radii 8 cm and 1 cm such that AB =13 cm.

Now, angle ACB =90 degree where C is the center of another circle which touches the above two circles.

Now, ABC forms a right triangle where AB = 13 cm, AC = (r + 8) cm and BC = (1 + r) cm.

{Where r is the radius of the circle C.

Applying Pythagoras Theorem. AB² = AC² + BC²

⇒ 13² = (r + 8)² + (r + 1)²

⇒ 169 = r² + 16r + 64 + f² + 2r + 1

⇒ 2r² + 18r - 104 = 0

⇒ r² + 9r - 52 = 0

⇒ (r + 13)(r - 4) = 0

Hence, r = 4 {As the value of r can not be negative}

Therefore, the area of the circle C is π(4)² = 50.28 sq. cm. (Answer)

You might be interested in
Two classmates are preparing research papers and are organizing their information on index cards. William is using 4 in by 6 in
ch4aika [34]
Not similar one is using a 20 in area and the other is using a 96 in area
3 0
3 years ago
In triangle XYZ right angled at Y. Find the length of the hypotenuse if the length of the other two sides is 1.6 cm and 6.3 cm.
const2013 [10]

Answer:

6.5 cm

Step-by-step explanation:

From Pythagoras theorem

C^2= a^2 + b^2

Where a, b are the sides of the triangle

C= hypotenus sides of the triangle

two sides are given as 1.6 cm and 6.3cm respectively.

C^2= 1.6^2 + 6.3^2

C^2= 2.56 + 39.69

C^2 = 42.25

C= √42.25

C=6.5 cm

Hence, the length of the hypotenuse is 6.5 cm

7 0
2 years ago
What’s the ratio for 40 and 64
NARA [144]

Answer:

5/8, 5:8, or 5 to 8

Step-by-step explanation:

you have to simplify the ratio so you have to figure out what 40 and 64 have in common. tho right away you can assume that they both have 2 in common bcz they are both even so you can divide them both by two and get 20/32, and then you can do it again bcz they are both even again and get 10/16, and then you can do it again bcz they are also both even and get 5/8. now 5 is a prime number so you cant divide it any further so you stop it there. and i put three answers bcz there are three ways to write a ratio

6 0
3 years ago
.01mg is larger than .001g true or false
zloy xaker [14]

Answer

False

Step-by-step explanation:

3 0
3 years ago
Write and solve a proportion to answer the question. 3/4 is 60% of what number?
Ganezh [65]


3/4 equals .75, and 60% equals .60. Therefore, we can set up an equation. .75=.60x, where x is the number we are looking for.

Divide each side by .60 to get the variable by itself. .75/.60= 1.25.


Hope this helped!!! :)

6 0
3 years ago
Other questions:
  • A man bough 50 brushes at $3 each,he sold them for $5 each. How much profit will he make? Please show your work
    11·1 answer
  • T.L Hanna High School’s theatre department is putting on their annual play. Tickets (t) are $12 each. Parking is $5 flat. You an
    11·1 answer
  • Solve the equation, 4 - (x + 1) = 6.
    13·1 answer
  • SORRY ABOUT THE LAST ONE HELP ME PLES ASWDFEGHRJKT
    10·2 answers
  • How do you find the exact surface area of a rectangular <br> prism?
    12·1 answer
  • Find the missing angles... both 4 and 5 separately
    7·1 answer
  • PLEASE HELP! ASAP!!! Suppose you know two angles, angel A and Angle B, are supplementary. The measure of angle A is 5 times the
    14·1 answer
  • HELLLPPPPPPPP PLEASEEE use the image
    6·2 answers
  • 4x - 4 + 112 = 23x - 6
    10·2 answers
  • A spaceship is traveling at a steady rate. The table shows the distance the spaceship travels in a given period of time. Find th
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!