User curioushuman - Mathematics Stack Exchange

9 votes

5 answers

2k views

Can a straight line be drawn through a single node on an infinite square grid without passing through any other nodes?

asked May 2 at 14:15

5 votes

2 answers

128 views

How to prove that the $\angle CED$ of the triangle below is equal to $\frac{1}{2} \angle\alpha\;?$

asked May 2, 2023 at 12:23

5 votes

3 answers

149 views

Prove if $\frac{a - b}{a + b} + \frac{b - c}{b + c} + \frac{c - a}{c + a} = 0$, then one of the terms is equal to $0$.

asked Jun 30, 2023 at 10:38

3 votes

2 answers

119 views

Showing that in a triangle $ABC$, $\angle ABC = 60°$ , the following intersection points, and points $B$, and $C$ lie on the same circle

asked Jun 14, 2023 at 15:04

3 votes

2 answers

195 views

Proving that a smaller inscribed, tangent circle to another circle makes an angle bisector of the given angle, joining the two tangent points

asked Jun 22, 2023 at 15:30

3 votes

2 answers

77 views

How prove that $AD$ and $BC$ of the given convex quadrilateral are parallel?

asked May 11, 2023 at 23:01

2 votes

1 answer

76 views

How to prove that given polygonal chain of line segments is greater than a given straight line?

asked Apr 10, 2023 at 13:40

2 votes

1 answer

110 views

How to make sure that I actually proved a theorem, when a result seems to be correct?

asked Jun 22, 2022 at 12:24

2 votes

3 answers

85 views

How to prove that I've found the locus of the centers of the circles that pass through "these" two points?

asked Jun 24, 2022 at 21:59

2 votes

2 answers

55 views

Why does a geometric construction exercise has a unique solution, when two similar triangles are the answers of the exercise?

asked Jul 3, 2022 at 13:29

2 votes

2 answers

45 views

Determining Parameter Values for a Set of Solutions Involving Absolute Value Equations

asked Apr 10 at 14:18

1 vote

0 answers

33 views

Equality of Segments in a Corner with Two Tangent Inscribed Circles

asked Sep 14, 2023 at 11:49

1 vote

1 answer

82 views

Proving that two tangent circles, in the case when one is insrcibed into the other, share common tangent line

asked Jun 25, 2023 at 11:59

0 votes

1 answer

290 views

Proving that two circles intersecting at only one point share a common tangent line trough the given point

asked Jun 17, 2023 at 8:33

0 votes

0 answers

71 views

Find the Length of Parallel Line Through Trapezoid's Diagonals Intersection with given Bases Lengths

asked Aug 31, 2023 at 4:19

0 votes

0 answers

37 views

How to find out how many solutions some exercise has?

asked Jul 5, 2022 at 20:56

0 votes

0 answers

51 views

How to prove that two circles can't have more then 2 intersection points?

asked Jul 8, 2022 at 12:25

0 votes

1 answer

254 views

In a convex n-gon ( n≥4) no three diagonals intersect at one point. Prove that the number...

asked Jul 28, 2022 at 0:07

0 votes

0 answers

39 views

How to prove that $(4n + 3)$ and $(20n + 23)$ are mutualy prime? [duplicate]

asked Mar 22, 2023 at 9:00

0 votes

1 answer

31 views

How to prove that $\overline{a_na_{n-1}...a_ka_{k-1}...a_0} ≡ \overline{a_{k-1}a_{k-2}...a_0}$ mod($5^k$)? [duplicate]

asked Apr 12, 2023 at 19:16

0 votes

1 answer

31 views

Can we add a valid value for an unknown variable in an equation by multiplying both sides of the equation by the same number/equation?

asked Jun 11, 2023 at 11:12

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21 Questions

Can a straight line be drawn through a single node on an infinite square grid without passing through any other nodes?

How to prove that the $\angle CED$ of the triangle below is equal to $\frac{1}{2} \angle\alpha\;?$

Prove if $\frac{a - b}{a + b} + \frac{b - c}{b + c} + \frac{c - a}{c + a} = 0$, then one of the terms is equal to $0$.

Showing that in a triangle $ABC$, $\angle ABC = 60°$ , the following intersection points, and points $B$, and $C$ lie on the same circle

Proving that a smaller inscribed, tangent circle to another circle makes an angle bisector of the given angle, joining the two tangent points

How prove that $AD$ and $BC$ of the given convex quadrilateral are parallel?

How to prove that given polygonal chain of line segments is greater than a given straight line?

How to make sure that I actually proved a theorem, when a result seems to be correct?

How to prove that I've found the locus of the centers of the circles that pass through "these" two points?

Why does a geometric construction exercise has a unique solution, when two similar triangles are the answers of the exercise?

Determining Parameter Values for a Set of Solutions Involving Absolute Value Equations

Equality of Segments in a Corner with Two Tangent Inscribed Circles

Proving that two tangent circles, in the case when one is insrcibed into the other, share common tangent line

Proving that two circles intersecting at only one point share a common tangent line trough the given point

Find the Length of Parallel Line Through Trapezoid's Diagonals Intersection with given Bases Lengths

How to find out how many solutions some exercise has?

How to prove that two circles can't have more then 2 intersection points?

In a convex n-gon ( n≥4) no three diagonals intersect at one point. Prove that the number...

How to prove that $(4n + 3)$ and $(20n + 23)$ are mutualy prime? [duplicate]

How to prove that $\overline{a_na_{n-1}...a_ka_{k-1}...a_0} ≡ \overline{a_{k-1}a_{k-2}...a_0}$ mod($5^k$)? [duplicate]

Can we add a valid value for an unknown variable in an equation by multiplying both sides of the equation by the same number/equation?