###### Answer: b. sin(B) = cos(90 – B)

Triangle = Tri (three) + Angle. In Euclidean geometry any three points when non- collinear determine a unique triangle and simultaneously a unique plane (i.e. a two …

Fri Aug 17 2001 14:30:00 GMT-0400 (Eastern Daylight Time) · Given an acute angle A = θ of a right-angled triangle the hypotenuse h is the side that connects the two acute angles. The side b adjacent to θ is the side of the triangle that connects θ to the right angle. The third side a is said to be opposite to θ.

The Kepler triangle is a right triangle whose sides are in a geometric progression. If the sides are formed from the geometric progression a ar ar 2 then its common ratio r is given by r = √ φ where φ is the golden ratio. Its sides are therefore in the ratio 1 : √ φ : φ. Thus the shape of the Kepler triangle is uniquely determined (up to a scale factor) by the requirement that its sides be in a geometric …

Similarity (geometry) – Wikipedia

Isosceles triangle – Wikipedia

Exterior angle theorem – Wikipedia

The incenter of the triangle also lies on the Euler line something that is not true for other triangles. If any two of an angle bisector median or altitude coincide in a given triangle that triangle must be isosceles. Area. The area of an isosceles triangle can …

If a triangle has a side of length b and an altitude drawn to that …