###### Answer: 4.1 inches

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. If the angle θ is given then all sides of the right -angled triangle are well-defined up to a scaling factor. This means that the ratio …

The length of the side of one square divided by that of the next smaller square is the golden ratio. … just as the 3– 4 -5 triangle is the only right triangle proportion with edge lengths in arithmetic progression. The angle with tangent corresponds to the angle that the side of the pyramid makes with respect to the ground 51.827… degrees (51° 49′ 38″). A nearly similar pyramid shape …

The area of a triangle is half of one side a times the height h from that side : =. An equilateral triangle with a side of 2…