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Mathematics
Jamil Sanjakdar's user avatar
Jamil Sanjakdar's user avatar
Jamil Sanjakdar's user avatar
Jamil Sanjakdar
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View all questions and answers
25
Why is this angle always less than $49°$?
Nov 14, 2025
18
Is there a simple method to prove that this triangle is isosceles?
Aug 12, 2025
11
An angle in a triangle satisfying $a^3 + b^3 = c^3$
Mar 27
10
Calculating the radius of a semicircle inscribed in a triangle
Apr 21
8
Are the diagonals of this cyclic quadrilateral perpendicular if it verifies this known relation?
Aug 26, 2025
8
What is the measure of the new angle?
Sep 2, 2025
8
Find the circle circumscribed about four other circles that are tangent to two of its chords.
Mar 5
8
What is the area of the central pentagon in this irregular pentagram?
Oct 11, 2025
8
Is there an elegant proof to this old problem of parallelism that dates back to the 19th century?
Dec 15, 2025
7
Can we prove this conjecture related to the trisection of the angle?
Sep 5, 2025