Area of regular octagon
96686
Determine the area of a regular octagon with vertices on the unit circle
85184
Maximize area of a triangle with fixed perimeter
5
Prove area of a quadrilateral is $\frac14[4m^2n^2-(b^2+d^2-a^2-c^2)^2]^{\frac12}$
6151
Evaluating $\int_a^b \frac12 r^2\ \mathrm d\theta$ to find the area of an ellipse
26259
Get surface area of a mesh?
42871
Quotient of a local regular ring
26329
Is there a shape with infinite area but finite perimeter?
35629
Trisect a quadrilateral into a $9$-grid; the middle has $1/9$ the area
33027
Maximum area of a square in a triangle
92659
What is area of shaded region?
83892
How to calculate this area? (portion of a sphere inside a cylinder )
62135
Area under the graph of a convex function
10515
Area of an irregular polygon
25053
How do I find the area of this region?
152509
Does there exist a side-rational triangle of area $1$?
102297
Construction of a regular pentagon
117020
Regular $n$-gon in the plane with vertices on integers?