File:Isosceles-right-triangle.svg - Wikipedia

File:Basic right triangle.svg - Wikipedia

What is interior angle of a polygon with 35 sides?

Equilateral triangle and other lines in a circle. p + r = q

Can you make a rectangle with a parallelogram?

File:IsoscelesTriangleProofTextbook.svg - Wikipedia

Shapes and Paths [DGLogik]

File:Isosceles-triangle-more.svg - Wikipedia

Skylight - Triangle Dimensions & Drawings

File:Triangle rectangle amb altura - Right-angled triangle with

File:Golden triangle and Fibonacci spiral.svg - Wikipedia

Equilateral triangle and other lines in a circle. p + r = q