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pochemuha
3 years ago
10

Help with number 13 please

Mathematics
1 answer:
Nataly_w [17]3 years ago
8 0
The answer is B and C
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Please help me!
marusya05 [52]

Answer:


Step-by-step explanation:

Nice summary problem.

<AEC

  • AEC = 360 - 243.5 = 116.5    
  • The number of degrees in 1 rotation of a circle = 360o. You have accounted for 243.5 degrees. What is left over is the answer.

<EAD and <ECD

Both of these are tangents to a circle. Tangents meet radii at 90 degree angles.

<EAD = <ECD = 90 degrees

<ABC

<ABC is 1/2 the central angle. The Central angle is <AEC

  • < AEC = 116.5
  • <ABC = 1/2 * 116.5
  • <ABC = 58.25

<ADC

There are 2 ways of doing this. You should know both of them.

<em><u>One</u></em>

All quadrilaterals = 360 degrees. You know three of the angles. You should be able to find ADC

  • <ADC + 90 + 90 + 116.5 = 360     Add the four angles together.
  • <ADC + 296.5 = 360                   Combine terms on the left
  • <ADC = 360 - 296.5                    Subtract 238.25 from both sides
  • <ADC = 63.5                                 Answer

<em><u>Method Two</u></em>

<ADC = 1/2 (major Arc - Minor Arc)  This formula is fundamental to circle / tangent properties. The Major arc is the larger of the two parts of the circumference of a circle. The Minor arc is the smaller.

  • <ADC = 1/2(243.5 - 116.5)
  • <ADC = 1/2(127)
  • <ADC = 63.5
8 0
3 years ago
Need help on this activity!!
Artyom0805 [142]

Answer:

C

Step-by-step explanation:

4 0
3 years ago
The faster a vehicle is going, the further it will continue to travel after the brakes are applied. Which is the dependent varia
harina [27]
The answer would be kinetic energy
4 0
3 years ago
What is the product of (5× + 1)(5x - 1)?
padilas [110]

we are given

(5x + 1)(5x - 1)

we can distribute it

5x*5x-1*5x+1*5x-1*1

25x^2-5x+5x-1

now, we can simplify it

25x^2-1...............Answer

6 0
3 years ago
Please solve using the image. No links.
Nesterboy [21]

Answer:

1/10 + 1/2 = 1/10 + <em><u>5/10</u></em> = <em><u>6/10</u></em>

6 0
3 years ago
Read 2 more answers
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