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2. Congruence (geometry) - Wikipedia

   en.wikipedia.org/wiki/Congruence_(geometry)

   The congruence theorems side-angle-side (SAS) and side-side-side (SSS) also hold on a sphere; in addition, if two spherical triangles have an identical angle-angle-angle (AAA) sequence, they are congruent (unlike for plane triangles).

3. Corresponding sides and corresponding angles - Wikipedia

   en.wikipedia.org/wiki/Corresponding_sides_and...

   The orange and green quadrilaterals are congruent; the blue one is not congruent to them. Congruence between the orange and green ones is established in that side BC corresponds to (in this case of congruence, equals in length) JK, CD corresponds to KL, DA corresponds to LI, and AB corresponds to IJ, while angle ∠C corresponds to (equals) angle ∠K, ∠D corresponds to ∠L, ∠A ...

4. Hinge theorem - Wikipedia

   en.wikipedia.org/wiki/Hinge_theorem

   In geometry, the hinge theorem (sometimes called the open mouth theorem) states that if two sides of one triangle are congruent to two sides of another triangle, and the included angle of the first is larger than the included angle of the second, then the third side of the first triangle is longer than the third side of the second triangle. [1]

5. Triangle - Wikipedia

   en.wikipedia.org/wiki/Triangle

   Triangles have many types based on the length of the sides and the angles. A triangle whose sides are all the same length is an equilateral triangle, [3] a triangle with two sides having the same length is an isosceles triangle, [4] [a] and a triangle with three different-length sides is a scalene triangle. [7]

6. List of Forgotten Realms modules and sourcebooks - Wikipedia

   en.wikipedia.org/wiki/List_of_Forgotten_Realms...

   FR module (retroactive). 36: N4: 0–1: 0-88038-326-7: Under Illefarn: Steve Perrin: 1987: First labelled FR module. 48: N5: 0–3: 0-88038-489-1: OA—Oriental Adventures was originally its own campaign setting, but the setting has been incorporated into Forgotten Realms. Swords of the Daimyo: David Cook: March 1986 ― 68: OA1: 6–10: 0 ...

7. Congruent number - Wikipedia

   en.wikipedia.org/wiki/Congruent_number

   if p ≡ 3 (mod 8), then p is not a congruent number, but 2 p is a congruent number. if p ≡ 5 (mod 8), then p is a congruent number. if p ≡ 7 (mod 8), then p and 2 p are congruent numbers. It is also known that in each of the congruence classes 5, 6, 7 (mod 8), for any given k there are infinitely many square-free congruent numbers with k ...