You got this wrong: 8/12 = BD/DC
Should be: 6/12 = BD/DC (But there's nothing you can do with this.)
The correct way is 6/12 = BD / (8 - BD) correct!!!
AD => x BD => 17 - x
82 - x2 = 162 - (17 - x)2
x = 97/34 AD = 97/34
CD = sqrt(82 - x2) CD = (15√287) / 34
[ACD] = 1/2(AD * CD)
[ACD] = (1455√287) / 2312 = 10.66144601
A circle has a radius of 25. A circular sector, with an angle of 120 degrees at the center, is cut from the circle, and then rolled to form a cone. Find the volume of the cone.
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Circle radius = 25 Sector angle = 120º
Cone slant height sh = 25
The length of 120º arc = 162/3 pi
Cone radius r = 81/3
Cone height h = sqrt[252 - (81/3)2]
Cone volume = [pi(81/3)2 * h] / 3
Cone volume = 1714.075208
This one's very hard to solve.
We know that triangle ABC must be an isosceles triangle (AC = BC)!!!
Who did give you 2 ++ for the wrong answer? Read the question again.
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Angle Z = 90º XY = 10 YZ = √51 XZ = 7 (correct)
XY => hypotenuse YZ => opposite XZ => adjacent
tan(X) = opposite / adjacent
tan(X) = √51 / 7
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btw... 7 / 10 = sin(Y)
Triangle ABC has the height AD and angle A = 90º. If CD = 4, and BD = 5, find this ratio [ACD]/[ABD].
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AD = x
√(42+x2) * √(52+x2) = 9x
AD = 2√5
[ACD] / [ABD] = 4/5
If the ratio of children to adults is 3:53:5 and there are 120120 children at an amateur surfing competition, how many adults are in attendance?
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3/5 = 120/adults
adults = 200
Answer #2 is correct!!!
Sorry to say, but you made a couple of mistakes:
1/ Triangles MOQ and NOR are not similar!!!
2/ QO and RO are not equal!!!
QN and RM are the medians of triangle PQR.
The ratio of QO to NO is 2:1
OR = sqrt[(QN/3)2 + (PR/2)2]
Your answer: PM = 5√11 = 16.58312395
Correct answer: PM = 14.05346932
Neither of the above answers is correct!!!
The correct answer is as follows:
PM = [sqrt(2 * 132 + 2 * 182 - 142)] / 2
PM ≈ 14.053
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Sides: a = 13 b = 18 c = 14 Area: T = 90.421 Perimeter: p = 45 Semiperimeter: s = 22.5 Angle ∠ A = α = 45.859° = 45°51'32″ = 0.8 rad Angle ∠ B = β = 83.533° = 83°31'57″ = 1.458 rad Angle ∠ C = γ = 50.609° = 50°36'31″ = 0.883 rad Height: ha = 13.911 Height: hb = 10.047 Height: hc = 12.917 Median: ma = 14.756 Median: mb = 10.075 Median: mc = 14.053
Hey, what's going on here? Someone doesn't like correct answers; that must be you, Melody.
Would you give me a reasonable explanation for blocking my answer?
A cube has edges of length 1 cm and has a dot marked in the center of the top face. The cube is sitting on a flat table. The cube is rolled, without lifting or slipping, in one direction so that at least two of its vertices are always touching the table. The cube is rolled until the dot is again on the top face. The length, in centimeters, of the path followed by the dot is c(pi), where c is a constant. What is c?
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c = φ (Golden ratio φ ≈ 1.618033989)
c = (1 + √5) / 2
Angle AEC = arctan(6/13) = 24.77514057º
Your numbers are wrong!!!
EG must be smaller than AD!!!
w = - 41/3
x = - 111/3
y = 132/3
z = 192/3
xz + yz = 458/9
+1694 +1694 +1694 +1694 +1694 +1694 +1694 +1694 
) question is here:> http://web2.0calc.com/questions/both-circles-have-the-same-radius-nbsp-r-1-nbsp-if-area-nbsp-a-nbsp-area-nbsp-b-nbsp-area-nbsp-c-what-is-the-distance-between-the
