ayyookyndall
  • ayyookyndall
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Mathematics
  • Stacey Warren - Expert brainly.com
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katieb
  • katieb
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anonymous
  • anonymous
Use this theorem SAS Similarity Theorem. Notice the two sides of triangle TRS are proportional to the two sides of triangle TPQ. Next you notice that the included angle of these sides is the same. Therefore, similar. Let me know if you got it :)
ayyookyndall
  • ayyookyndall
So I am correct?
anonymous
  • anonymous
Yup :D

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More answers

UsukiDoll
  • UsukiDoll
yes it is correct
anonymous
  • anonymous
First you have to apply Pythagorean theorem .. you have 3 sides then 3 combination try all of them first to be sure if it is right-angled triangle or not then see if it obtuse or acute , but first lets get through steps
UsukiDoll
  • UsukiDoll
a right triangle is exactly 90 degrees acute triangle is < 90 degrees obtuse tirangle > 90 degrees
UsukiDoll
  • UsukiDoll
ok :)
anonymous
  • anonymous
Sorry I will re answer :D
ayyookyndall
  • ayyookyndall
Take your time. :-)
anonymous
  • anonymous
1) 80 & 89 \[\sqrt{80^2 + 89^2} \neq 39\] 2) 89 & 39 \[\sqrt{89^2+39^2} \neq 80\] 3) 80 & 39 \[\sqrt{80^2 + 39^2} = 89\] So this is a right-angled triangle :)
ayyookyndall
  • ayyookyndall
How? A right -angled triangle would have a 90 degree with it...
anonymous
  • anonymous
And you know that for a right-angled triangle Pythagorean theorem is applicable ? So why not using this fact to solve ! :D Any way you can draw them like this and get Ur calculator and some coffee then do Ur calculations for each angle |dw:1432968271852:dw|
anonymous
  • anonymous
You know the formula for arc length ? It's : |dw:1432968741023:dw| So applying this to the question we will get : \[\frac{ 90 }{ 360 } * 2π * 10 = ?\] So let me know your answer :)
anonymous
  • anonymous
*\[\frac{ n^o }{ 360^o } * 2πr\]
anonymous
  • anonymous
How you figured out this answer so ?
ayyookyndall
  • ayyookyndall
I used my calculator
ayyookyndall
  • ayyookyndall
I was correct, right?
anonymous
  • anonymous
Nope ! You have done sth wrong :D Just type the equation I provided you and let me know
ayyookyndall
  • ayyookyndall
What does n stand for?
anonymous
  • anonymous
The angle that the arc includes .. Sorry its 270 not 90 :)
anonymous
  • anonymous
What is the angle for XPY ?
ayyookyndall
  • ayyookyndall
270 degrees?
anonymous
  • anonymous
Aha
ayyookyndall
  • ayyookyndall
I got 94.2
anonymous
  • anonymous
Nice .. This is the answer ! :D Now to get it in terms of pi just divide the result by π and you will get : 30 Then the final answer will be 30π :)
ayyookyndall
  • ayyookyndall
Okay. Thank you.
anonymous
  • anonymous
Welcomes :) Feel free to ask me anytime :)

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