Geometrical Property of Altitudes Sometimes the opposite side isn’t quite long enough to draw an altitude, so we are allowed to extend it to make an altitude possible. This line containing the opposite side is called the extended base of the altitude. The intersection of the extended base and t.....

### Mathematic

### Altitude of a Triangle

Altitude of a Triangle In geometry, an altitude of a triangle is a line segment through a vertex and perpendicular to a line containing the base. The definition of the altitude of a triangle is a line that extends from one vertex of a triangle perpendicular to the opposite side. Sometimes the opp.....

### Properties of Angles of a Triangle

### Order of a Surd

### Induction Proof – Problems with Solutions

### Theorem of Three Perpendiculars

Theorem of Three Perpendiculars A line is said to be perpendicular to another line if the two lines intersect at a right angle. Explicitly, a first line is perpendicular to a second line if (1) the two lines meet, and (2) at the point of intersection the straight angle on one side of the first [&.....

### Converse of the Theorem on Parallel Lines and Plane

Converse of the theorem on parallel lines and plane: Theorem: If two straight lines are parallel and if one of them is perpendicular to a plane, then the other is also perpendicular to the same plane. When lines and planes are perpendicular and parallel, they have some interesting properties. Lin.....

### Theorem on Parallel Lines and Plane

Theorem on Parallel Lines and Plane Theorem: If two straight lines are parallel and if one of them is perpendicular to a plane, then the other is also perpendicular to the same plane. When lines and planes are perpendicular and parallel, they have some interesting properties. Lines and planes are.....

### Theorem on Co-planar

Theorem on Co-planar A set of points, lines, line segments, rays or any other geometrical shapes that lie on the same plane are said to be Coplanar. In geometry, a set of points in space are coplanar if there exists a geometric plane that contains them all. For example, three points are always co.....

### Theorems on Straight Lines and Plane

### Axioms: Solid Geometry

Axioms: Solid Geometry Axioms involving reflection at a plane were approached through physical observations of reflection from a plane mirror. Axioms are general statements made about real numbers. Sometimes they are called algebraic postulates. Often what they say about real numbers holds true f.....

### Dihedral Angle

The dihedral angle is an angle between two distinct planes that are intersecting in any way. We can say that the interior angle between two planes is known as a dihedral angle. The plane angle between two intersecting planes is called a dihedral angle between the planes. It is an angle is the ang.....