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Apr
12
comment Construct a line which intersects the interior two circles at chords of equal length.
That's it. You got it.
Apr
12
comment Construct a line which intersects the interior two circles at chords of equal length.
You make a circle tangent to that chord in the bigger circle and in the smaller too. Then you make a tangent line to these both circles.
Apr
12
comment Construct a line which intersects the interior two circles at chords of equal length.
That's not the only solution. You can make a similar construction with any chord smaller than the diameter of the smaller circle.
Apr
12
answered Definite integral in spherical coordinates
Apr
12
comment Construct a line which intersects the interior two circles at chords of equal length.
What have you tried?
Apr
10
answered Finding the measure of an arc on a circle
Apr
5
revised Given length of two medians and one altitude , find the length of one side.
fix value of BC
Apr
5
answered Given length of two medians and one altitude , find the length of one side.
Apr
4
answered Find the area of shaded triangle inside of a rectangle.
Mar
31
answered Finding ratio of external division in a triangle.
Mar
31
comment Vector triangle lines intersection proof
@MarterJs We know that $AN=\frac{1}{3}NC$ and that $AN+NC=AC$. Hence $AN+3AN=AC$ and $AN=\frac{1}{4}AC$.
Mar
28
answered Vector triangle lines intersection proof
Mar
25
comment Minimum area of a triangle
If you can prove that the least area occurs when side $a$ is the base of an isosceles triangle then you are done.
Feb
9
comment How can I calculate calculate two internal angles of a quadrilateral given the lengths of both diagonals and two opposite sides?
@ProgrammingThomas If you want a general formula, you can take $AC=kx$ (for $1 \le k \le 3$) and you will get: $b = \frac{a}{2}- \frac {\pi}{2}+ \arccos(- \frac{(k^2 - 1)}{4 \sin {\frac{a}{2}}}+ \sin {\frac{a}{2}})$.
Feb
9
comment How can I calculate calculate two internal angles of a quadrilateral given the lengths of both diagonals and two opposite sides?
@ProgrammingThomas The formula is derived from the example I have given.
Feb
8
answered How can I calculate calculate two internal angles of a quadrilateral given the lengths of both diagonals and two opposite sides?
Feb
7
answered Can someone help out with this geometry problem plase?
Feb
6
comment triangle proof: intersection of $w_\alpha$ and $m_a$ is outside $\Delta ABC$
@ulead86 Begin with $\triangle ABC$, the circle, its center $O$ and $ma$. Let $M$ the intersection point of $m_a$ and the circle such that $AM$ intercepts $BC$. $M$ is clearly outside $\triangle ABC$ by construction. Note that $m(\angle ABM)=\frac{1}{2} m(\angle BOM)$ and $m(\angle CAM)=\frac{1}{2} m(\angle COM)$, because $\angle BAM$ and $\angle CAM$ are inscribed angles. So $AM$ is the angle bisector of $\angle ABC$, $M$ is the intersection point of $w_{\alpha}$ and $m_a$, and $M$ is outside $\triangle ABC$.
Feb
5
comment triangle proof: intersection of $w_\alpha$ and $m_a$ is outside $\Delta ABC$
@ulead86 yes, I think it is sufficient.
Feb
5
answered triangle proof: intersection of $w_\alpha$ and $m_a$ is outside $\Delta ABC$