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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 :)
So I am correct?
Yup :D

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Other answers:

yes it is correct
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
a right triangle is exactly 90 degrees acute triangle is < 90 degrees obtuse tirangle > 90 degrees
ok :)
Sorry I will re answer :D
Take your time. :-)
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 :)
How? A right -angled triangle would have a 90 degree with it...
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|
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 :)
*\[\frac{ n^o }{ 360^o } * 2πr\]
How you figured out this answer so ?
I used my calculator
I was correct, right?
Nope ! You have done sth wrong :D Just type the equation I provided you and let me know
What does n stand for?
The angle that the arc includes .. Sorry its 270 not 90 :)
What is the angle for XPY ?
270 degrees?
Aha
I got 94.2
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 :)
Okay. Thank you.
Welcomes :) Feel free to ask me anytime :)

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