I'm just leafing through, looking for some that stumped me, and I was kind of confused on how to figure out #5 on the Chap 10 Cumulative Review.. Would you create an apothem from the radius to the side of the square, and then figure out the hypotenuse of the right triangle created??
You can use the apothem and trig if you like... if you do, I have this really neat nuclear fly swatter to sell you!
You want the sprinkler to reach the vertices of the square, yes? Hmmm, isn't there a line that connects the opposing vertices of the square that can be easily/quickly measured? Wouldn't half of this measure be the radius that you need?
lmk if this help... fyi the question asks you to approximate and B is the answer choice... i.e. 12.5√2
The problem is giving you percentages, not degrees. If a sector of the circle was 25%, that would clearly mean 90 degrees, right? So to answer the question, you need to be able to calculate the degrees for 5% and 8% of a circle, yes???
I'm just leafing through, looking for some that stumped me, and I was kind of confused on how to figure out #5 on the Chap 10 Cumulative Review.. Would you create an apothem from the radius to the side of the square, and then figure out the hypotenuse of the right triangle created??
ReplyDeleteYou can use the apothem and trig if you like... if you do, I have this really neat nuclear fly swatter to sell you!
DeleteYou want the sprinkler to reach the vertices of the square, yes? Hmmm, isn't there a line that connects the opposing vertices of the square that can be easily/quickly measured? Wouldn't half of this measure be the radius that you need?
lmk if this help... fyi the question asks you to approximate and B is the answer choice... i.e. 12.5√2
MrC
Helped!
DeleteI'm having trouble on #7 in the Chap 10 Cumulative Review, how did they come to any of those answers?
ReplyDeleteYou should be able to state the area in terms of s... the shaded areas are clearly 1/3 the area of the entire triangle... correct answer choice is B.
DeleteI'm not sure how to state the area in terms of s! I'm trying to figure out how they got to the answers..
DeleteIf the side of an equilateral triangle is s, then the altitude (height) of that triangle will be (s/2)√3, based on 30-60-90, right?
DeleteSo the area will be (1/2)s(s/2)√3 or s^2√3/4, right?
So the area of shaded region will be 1/3 of the above, or:
s^2√3/12
I hear ya..., too easy!!
I'm not sure what the question is asking in #23 a in the Chap 10 Cumulative Review
ReplyDeleteThe problem is giving you percentages, not degrees. If a sector of the circle was 25%, that would clearly mean 90 degrees, right? So to answer the question, you need to be able to calculate the degrees for 5% and 8% of a circle, yes???
DeleteIs any of this helping????
ReplyDeleteI have a question on number 9 on pg 757. I am not sure where to start.
ReplyDeleteWill we have bibles on the final? No?
ReplyDeleteDo we have to memorize all the formulas too or will you give them to us?
ReplyDeleteFor number 9 it would have to be 5 because any other length would mean the hypotenuse is shorter than the long leg
ReplyDelete