Since a decagon has 10 sides
You’ll do 624 divided by 10
624/10= 62.4
It would be 1000,000 rounded to the nearest hundred.
Octagon, stop sign.
Eight isoscles triangles. It looks like we're told the side is 9.9 and the height to the side (also called the apothem) is 12.
So each isosceles triangle has area (1/2)(9.9)(12) and we have eight of them,
area = 8(1/2)(9.9)(12) = 475.2
Answer: 475.2
Usually we wouldn't be told 9.9 -- this is the baby version. We know each of those isoscles triangles has unique angle 360/8=45 degrees, so the apothem and half the side of the octagon are a right triangle with acute angle 22.5 degrees.
The area of the right triangle with long leg 12, short leg x,
tan 22.5 = x/12 or
x = 12 tan 22.5
Twice that is what we're told is 9.9; let's check:
2x = 24 tan 22.5 = 9.941125496954282
The area of the little right triangle is
(1/2) 12 × 12 tan 22.5
and there are 16 of these
16 (1/2) 12 × 12 tan 22.5 ≈ 477.174
It's only true for specific x values but not all x values. The final answer is FALSE.<span>
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Hey there!
To solve this problem, first turn the mixed numbers to improper fractions then multiply 2 2/3 and 1 1/4 . . .
2 2/3 = 8/3
1 1/4 = 5/4
8 x 5 = 40
3 x 4 = 12
= 40/12
Simplify 40/12 . . .
40/12 = 3 1/3 <--------
The answer to your question is option B.
The bananas weighed 3 1/3 pounds.
Hope this helps you.
Have a great day!
