<body><script type="text/javascript"> function setAttributeOnload(object, attribute, val) { if(window.addEventListener) { window.addEventListener('load', function(){ object[attribute] = val; }, false); } else { window.attachEvent('onload', function(){ object[attribute] = val; }); } } </script> <div id="navbar-iframe-container"></div> <script type="text/javascript" src="https://apis.google.com/js/plusone.js"></script> <script type="text/javascript"> gapi.load("gapi.iframes:gapi.iframes.style.bubble", function() { if (gapi.iframes && gapi.iframes.getContext) { gapi.iframes.getContext().openChild({ url: 'https://www.blogger.com/navbar.g?targetBlogID\x3d14084555\x26blogName\x3dPre-Cal+30S\x26publishMode\x3dPUBLISH_MODE_BLOGSPOT\x26navbarType\x3dBLUE\x26layoutType\x3dCLASSIC\x26searchRoot\x3dhttp://pc30s.blogspot.com/search\x26blogLocale\x3den_US\x26v\x3d2\x26homepageUrl\x3dhttp://pc30s.blogspot.com/\x26vt\x3d931551856370134750', where: document.getElementById("navbar-iframe-container"), id: "navbar-iframe" }); } }); </script>

Thursday, December 08, 2005

Chapter: Pre-Test, Scribe: Mr. K Late =/

Class started pretty strange, with no questions on the board. Except today we got to wait about 20 minutes for Mr. K to get into class. Side note: Mr. K, if you expect us to follow your guidelines to pass this class I think we ALL should follow them especially the BEING IN CLASS ON TIME thing ? Lol i'm not ranting on you I just thought it would be fun =D.

Today's class despite the wait, happened with a pre-test, OMG test tomorrow. Yeah that kind of thing lol, and here's the questions from the pre
test.


Question 1: The segment AB is tangent to the circle at point T. Which angle is qual to r ?

Choices: a) a b) b c) c d) d e) none of the these
Answer: a) a
Why you ask ? It's because of the tangent chord therom.





Question 2: Determine the value of x.

Choices: a) 50° b) 80° c) 90° d) 100° 3) none of these
Answer: b) 80°
Why you ask ? It's because of the central inscribed therom.






Question 3: Given the circle with centre O, which of the following best describes the relationship between x and y ?

Choices: a) x = y b) x + y = 180° c) x + y = 360° d) x + 2y = 360° e) none of these
Answer: d) x + 3y = 360°
Why you ask ? It's because of the central inscribed therom.






Question 4: In the diagram below, O is the centre of the circle. Determine the measure of angle x, in degrees.

Choices: a) 30° b) 40° c) 50° d) 60° e) none of these
Answer: c) 50°
Why you ask ? It's because of the central inscribed therom, but not really the therom it's better explained with the SPECIAL CASE OF THALES.






Question 5: In the diagram to the left, R, S, T and U are points on the circle with RS = RU = UT and SI = ST. Find the measure of LUST.

Choices: a) 30° b) 35° c) 36° d) 40° 3) none of these
Answer: c) 36°
Why you ask ? It's because triangle UST and RSU are both isoceles trianges LSUT and LSTU are both congruent and same goes with LRUS and LRSU. Which gives us something like this:






180 - 2b + a = 180
a = 2b

and

a + a + b = 180
2a+b = 180

With these two equations we can use substitution and like magic you get a number from a question that had no number. Ok Ok i'll do it for you guys don't have to get mad.

2 (2b) + b = 180
4b + b = 180
5b = 180
b = 36

And that's how question 5 was accomplishes have fun with it boys and girls NAR HAR HAR!



Question 6: Determine the measure of LECB, LBDC, LBAD and LDBE, where E is the centre of the circle. Justify your answers.

Answer:
Statment - Reason
EB = EC - Radius
LECB = 40° - Triangle ECB is isoceles
LBAD = 110° - Supplementary to LEBC
LBDC = 50° - Central inscribed therom
LDBE = 20° - Sum of triangle BCD




That was like whoa haha. Anyway that's what we did today in class hard questions ? Somewhat depending on if you know your theroms. Test tomorrow ? Shouldn't too much trouble why ? because EVERYONE should KNOW their theroms lol.

And guess what monday's scribe is PAMELA, haha see what happens when you miss class =P

1 Comments:

At 12/08/2005 5:34 PM, Blogger AichelleS. said...

lol that was quite an entertaining scribe post..I liked how you explained things by using different colours, good job!

 

Post a Comment

Links to this post:

Create a Link

<< Home