Answer:
Step-by-step explanation:
the perimeter of the semi-circle would be the diameter plus the circumference of half of the circle.
They want to know the perimeter of a square using the diameter of the sem-circle as ONE side, so the perimeter of the square would be 4 times the ONE side.
We should recall:
diameter = 2 times the radius circumference of a cirlce = 2π r
How do we find the diameter of the of the semi circle?
The perimeter of the semi circle is given as 108 cm
Perimeter of the semicirle = 2r + π r diameter plus semi circumference
108 = r ( 2 + π) factor out the r and solve for r
108 / (2 + π) = r divide both sides by ( 2 + r)
Now we know r, the perimeter of the squqre is 4 times 2r or 8r
perimeter of square = 8 [ 108 / (2 + π) ] π I used 3.14
= 864 / 5.14
= 168.1 cm I got rounded to nearest tenth
<em>When I re-checked by work I found a few math, logic and calculation errors. Please re-check my answer for any more mistakes.</em>
51:75
This is the same as 51/75.
Simplify by dividing 3 to the numerator and denominator:
17/25
Divide this to get a decimal:
17 / 25 = 0.68
Now multiply by 100 to get a percent:
0.68 * 100 = 68%
I think it should be 7x-35
Answer/Step-by-step explanation:
✔️Sin 22° = opp/hyp
Opp = 15
Hyp = 40
Sin 22° = 15/40
Simplify
Sin 22° = ⅜
✔️Tan 22° = opp/adjacent
opp = 15
Adjacent = √(40² - 15²) (pythagorean theorem)
Adjacent = √1,375 = 37.1 (nearest tenth)
Tan 22° = 15/37.1
Answer: B
Step-by-step explanation: I have no Idea if this is right but I’m just guessing that the answer is “B”.
