User Hosam H

7 votes

3 answers

239 views

Tracing a circle by a sliding triangle

asked Feb 28, 2022 at 10:05

7 votes

1 answer

222 views

Determining the ellipse tangent to the sides of a given convex pentagon [duplicate]

asked Nov 9 at 8:24

6 votes

1 answer

135 views

Challenging Coordinates Calculation

asked Jul 27 at 0:58

6 votes

2 answers

235 views

How to identify all the right circular cones passing through six arbitrary points

asked Nov 2, 2022 at 8:49

5 votes

1 answer

128 views

Showing that $(x,y)=\left(\frac{c\sin t+d}{a+b\cos t},\frac{e\cos t+f}{a+b\cos t}\right)$ parameterizes an ellipse

asked Oct 19, 2022 at 11:12

5 votes

3 answers

159 views

Maximize $xy + 2 yz + 6 x $ subject to $x^2 + y^2 + z^2 = 36 $

asked Jul 17 at 20:11

5 votes

1 answer

108 views

Angle of tilt of a rectangular water tank

asked Jul 12 at 8:10

5 votes

2 answers

218 views

Circumcircle in 3D

asked Jul 14 at 11:49

5 votes

1 answer

129 views

Largest circle inscribed in a cube

asked Jul 10 at 12:25

4 votes

1 answer

50 views

What is the new depth of water in the tilted tank?

asked Jul 10 at 8:46

4 votes

2 answers

131 views

A planar cut through an oblique cone

asked Jul 11 at 12:00

4 votes

3 answers

360 views

Find shaded area of a segment in a circle

asked Oct 13 at 11:06

4 votes

1 answer

251 views

Perspective image of a cuboid

asked Jan 3 at 19:03

4 votes

2 answers

90 views

Equivalence between two matrix expressions

asked Feb 5 at 13:30

4 votes

2 answers

195 views

Inscribing an ellipse in an irregular convex pentagon

asked Aug 24, 2022 at 17:35

4 votes

1 answer

99 views

Minimum area ellipse passing through the vertices of an isosceles trapezoid

asked Oct 16, 2021 at 8:38

3 votes

2 answers

238 views

Determining center of inscribed ellipse of a pentagon

asked Dec 12, 2021 at 9:44

3 votes

1 answer

174 views

Inscribing a regular tetrahedron in another regular tetrahedron

asked Feb 23, 2022 at 4:53

3 votes

1 answer

138 views

Common region between an icosahedron and a dodecahedron

asked Mar 31, 2022 at 13:10

3 votes

2 answers

121 views

Conditions on tetrahedron side lengths that guarantee existence of a sphere tangent to all its edges

asked Apr 21, 2022 at 17:45

3 votes

2 answers

73 views

Finding the vertex of the parabola parameterized by $p(t)=P_0+P_1t+P_2t^2$ for vectors $P_0, P_1, P_2$

asked May 6, 2022 at 5:33

3 votes

0 answers

52 views

Locating a point within a triangle with given conditions on distances to vertices

asked May 14, 2022 at 22:25

3 votes

2 answers

148 views

Find $ \int \frac{dx}{(x^2 + a^2)^3} $

asked May 17, 2022 at 17:56

3 votes

3 answers

190 views

Determine the center and orientation of an ellipse in $3D$ given two perspective images

asked Sep 9, 2022 at 11:04

3 votes

1 answer

68 views

Finding an oblique pyramid with a rectangular base which admits an inscribed sphere

asked Jun 11, 2022 at 1:25

3 votes

2 answers

339 views

Perspective image of a rectangle

asked Dec 31, 2022 at 9:29

3 votes

4 answers

389 views

Orthographic projection of a rectangle

asked Dec 31, 2022 at 16:32

3 votes

2 answers

99 views

Find $\theta$ in the following diagram

asked Oct 13 at 16:20

3 votes

1 answer

58 views

Equation of inscribed ellipsoid in a given tetrahedron with three given tangency points

asked Nov 13 at 12:06

3 votes

0 answers

113 views

Inscribing a sphere in an elliptical cone

asked Nov 20 at 8:04

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141 Questions

Tracing a circle by a sliding triangle

Determining the ellipse tangent to the sides of a given convex pentagon [duplicate]

Challenging Coordinates Calculation

How to identify all the right circular cones passing through six arbitrary points

Showing that $(x,y)=\left(\frac{c\sin t+d}{a+b\cos t},\frac{e\cos t+f}{a+b\cos t}\right)$ parameterizes an ellipse

Maximize $xy + 2 yz + 6 x $ subject to $x^2 + y^2 + z^2 = 36 $

Angle of tilt of a rectangular water tank

Circumcircle in 3D

Largest circle inscribed in a cube

What is the new depth of water in the tilted tank?

A planar cut through an oblique cone

Find shaded area of a segment in a circle

Perspective image of a cuboid

Equivalence between two matrix expressions

Inscribing an ellipse in an irregular convex pentagon

Minimum area ellipse passing through the vertices of an isosceles trapezoid

Determining center of inscribed ellipse of a pentagon

Inscribing a regular tetrahedron in another regular tetrahedron

Common region between an icosahedron and a dodecahedron

Conditions on tetrahedron side lengths that guarantee existence of a sphere tangent to all its edges

Finding the vertex of the parabola parameterized by $p(t)=P_0+P_1t+P_2t^2$ for vectors $P_0, P_1, P_2$

Locating a point within a triangle with given conditions on distances to vertices

Find $ \int \frac{dx}{(x^2 + a^2)^3} $

Determine the center and orientation of an ellipse in $3D$ given two perspective images

Finding an oblique pyramid with a rectangular base which admits an inscribed sphere

Perspective image of a rectangle

Orthographic projection of a rectangle

Find $\theta$ in the following diagram

Equation of inscribed ellipsoid in a given tetrahedron with three given tangency points

Inscribing a sphere in an elliptical cone