InvertedHammer:

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Scientific thinking.

An engineer in the making.

Question: is x the angle between the coins or the angle marked on the left coin?
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smh

no the x is on 50 cent singing P.I.M.P.

Nairlanders you guys are good with mathematics...I m impress.

tunde1200:
Your explanation make me understand this question!.
i don't know when i will know maths ooo.

Lol.... Maths would come very easy to you on your wedding day.... On the dance floor, when ya calculating expenses.

itstpia8:
no crashes, thanks.

Hehe he... I think we are Australian students, cos this maths is baffling us both

proudly9ja:

A circle has infinite number of sides

This one is obviously an optimist..... Half full, half empty same thing... Lol

spacyzuma:
It's 60 degrees.



Total sum of internal angles in a polygon = (n-2)*180

For a 12-sided polygon, it's (12-2)*180 = 1800

Thus, each internal angle is 1800/12 = 150.

The next part is hard to explain without diagrams, though.

For the 2 adjacent coins, the sum of their internal angles where they meet is 150 + 150 = 300.

At that point, the total angle is 360 degrees (angle around a point, or in a circle)

guy u are reasoning like me ,the rest part is really difficult to explain without diagrams

i wanted to add a picture sef

Teempakguy:
what's baffling here is that i don't know what to solve for. there clearly are two black lines along one coin. implying we have to solve for the angle subtended by the chord which is the side, and then there's that big, red X right in the middle of the coins, implying that we need to solve for the angle between the coins. and both answers are in the options.

anyway, to solve for the angle between two black lines, that is, if x is referring to that angle,

total angle in a circle, divided by twelve possible chords. 360/12 = 30.

to solve for the angle between the coins, angle in a straight line, minus interior angle between lines. 180 - 150 = 30.
this will give us half the angle of that point. because we had to draw a straight line, dividing that angle in two. then simply multiply by two and the angle you need is 60 degrees.

but which one are we supposed to find?!

I'm going for the one within the two black lines. seems legit.
so, the answer is 30 degrees.

This one is Obviously a politician

babseg:
What's the answer

12side=360` 1side= 30`ans

Answer D 60deg. Every smart science student up to SS1 should solve it without issues in 3mins maximum.

Ndeewonu:
There is a little confusion here concerning what they mean by "X".

However, if "X" is the angle between the two polygons, then...

Simply use INTERIOR (or EXTERIOR) ANGLES OF A REGULAR POLYGON formula.

Sum of Interior Angles = (n-2) × 180°

Each Angle (of a Regular Polygon) = (n-2) × 180° / n


Then, we have a polygon with 12 sides...

Each INTERIOR angle = (12-2) x 180/12

INT angle = 10 x 180/12

= 1800/12 = 150'

Each of the two adjoining INT angles of the 12-sided polygons = 150'

Therefore, the total angles = 150' x 2 = 300'

A circle = 360'

Therefore to find the inclined angle X,

360' - 300' = 60'

Ans = 60'

You jus had to get 60 degrees.... Ya like me... We both want to win, so we copy answers from the back of the text book.

iyke2ken:



This one is Obviously a politician

lol, what do you mean?

The answer is just 30 degree. The Polygon was only used to confuse many. Even if you use a polygon. It is a regular polygon with interior angle = 150 degree each. Since the triangle is Isosceles you have base angles s 75 degree each and and the last angle x =180-2(75) deg =30 deg. Besides the sum of the angle in a circle will remain to be 360. So 360/12 =30 deg

From an Engineer's perspective

babseg:
What's the answer

360/12side =30 The answer is 30 degree shikena.

Vetsolo:


12side=360`
1side= 30`ans

nope u r wrong

u will need to know and use the basic geometry rules

Kockane:


I wish we were still in school and this was continuous assessment and the teacher says those that fail this question will stay behind after school hours for extra mural classes. I go laff them ehn!

Na your type we day block outside school burst thier eyes.

abiodun175:

360/12side =30
The answer is 30 degree shikena.

i don tire for all these wuru wuru to answer

iyke2ken:



Na your type we day block outside school burst thier eyes.

Lmao! You sef, why you no go sabi book?

Kockane:


I wish we were still in school and this was continuous assessment and the teacher says those that fail this question will stay behind after school hours for extra mural classes. I go laff them ehn!

These particular ones would have to do extra moral classes for d whole term...thats what happens when an Olodo is forming ITK

swezenberg:
The answer is just 30 degree. The Polygon was only used to confuse many. Even if you use a polygon. It is a regular polygon with interior angle = 150 degree each. Since the triangle is Isosceles you have base angles s 75 degree each and and the last angle x =180-2(75) deg =30 deg. Besides the sum of the angle in a circle will remain to be 360. So 360/12 =30 deg

From an Engineer's perspective

Lol... Pls can you solve from a carpenter's perspective? Sebi it is different answers for different professions?

scarr:


These particular ones would have to do extra moral classes for d whole term...thats what happens when an Olodo is forming ITK

Azzzzin! Dis is one of those questions you dont spend more than 10 secs on in an MCQ type of exam. Some people dey mention dodecagon! shuuuuu...

Teempakguy:
lol, what do you mean?

See how he is carefully trying to solve and arrive at an answer that is appealing to everybody..... Like person way day campaign for vote... Lol

babseg:
What's the answer

a circle = 360,irrespective of whether two two sides meet,it still results to One side so the two coins are confusing plus the line which both coins were placed...therefore we use just one coin which was indicated so a circle is 360 with 12 sides means each side gets 30 degree each

babseg:
What's the answer

a circle = 360,irrespective of whether two two sides meet,it still results to One side so the two coins are confusing plus the line(180) which both coins were placed...therefore we use just one coin which was indicated so a circle is 360 with 12 sides means each side gets 30 degree each

babseg:
What's the answer

Where's your proof that this question baffled Australian students. Picture/Link or....

30

ChokolateBoss:
60 degrees.
Each angle of a polygon = 180(n - 2)/n
For 12-sided polygon, each angle
= 180 (12 - 2)/12 = 150 deg
X = 360 - (150 + 150) = 60

Yeah, just as simple as ABC. But the process can be more simplified.

30°+30°= 60° according to the formula.

Ok ok ok.. Enough everyone.. Check this out.

Theflint1:
Where's your proof that this question baffled Australian students. Picture/Link or....

seriously ?

so u can see the answer

Interior angle of a regular polygon = sum of interior angles ÷ number of sides
Sum=180(n-2)
No. Of sides=12
Hence the Interior angle=180(12-2)/12
= 150°
the exterior angles of a regular polygon always add up to 360°, so the exterior angle =360/12
=30°
The interior angle and its corresponding exterior angle always add up to 180° so 150° + 30° = 180° so that angle x is 3o degree the other coin is a distraction

Kockane:


Azzzzin! Dis is one of those questions you dont spend more than 10 secs on in an MCQ type of exam. Some people dey mention dodecagon! shuuuuu...

I Swear, u dont even need to calculate anything to know d answer, just open ur head, think and approximate, d question sef looks cheap for an Australian MCQ

x=60 degrees

Aw they Got 60 still beats me

EverestdeBliu:
Total angles in a circle = 360
Number of sides = 12
X = 360 ÷ 12
X = 30
Therefore,angle x is equals 30 degrees.