Kite

A Kite is a flat shape with straight sides. It has 2 pairs of equal-length adjacent sides. Characteristics of Kite Two pairs of sides Each pair is 2 equal-length sides that are adjacent The angles are equal where the 2 pairs meet Diagonals (dashed lines) cross at right angles, and one of the diagonals bisects

Cylinder: Definition, Properties, Types, Surface Area, Volume

“cylinder” was named base on Latin (Cylindrus) and Greek (Kylindros). It means “roll”, “roller”, and “tumblr”. Cylinder is a shape that is common in daily life such as can, money box, toilet tissue roll, tumbler, etc. Definition of Cylinder Cylinder is three-dimensional shape with two congruent parallel circular shape (circles or ellipse). There is also

Adjacent Angles

In the lesson below, you will learn about how to identify whether angles are adjacent. Definition Adjacent angles are 2 angles that have a common vertex & a common side. The vertex of an angle is the endpoint of the rays that form the sides of the angle. The common vertex and common side we mean here are

Alternate Exterior Angles

Definition When 2 lines are crossed by another line (Transversal): Alternate Exterior Angles are a pair of angles on the outer side of each of those two lines but on opposite sides of the transversal. How to remember the angle pairs are on Alternate sides of the Transversal, and they are on the Exterior of

Alternate Interior Angles

Definition When two lines are crossed by another line (Transversal): Alternate Interior Angles are a pair of angles on the inner side of each of those 2 lines but on opposite sides of the transversal. How To remember: The angle pairs are on Alternate sides of the Transversal, and they are on the Interior of

Sphere: Definition, Properties, Surface Area, Volume, Spheroid, and Hemisphere

Sphere is like circle in two-dimensional shape. But it is three-dimensional shape. Sphere things in daily life are like bubbles, marbles, balloons, balls, water drops, etc. Definition of Sphere Sphere is three-dimensional shape. It is a set of points that has same distance to the center. The distance is called radius (r). besides that, it

Quadrilateral: Definition, Properties, Family Tree, Formula, Examples

What Is Quadrilateral Quadrilateral is two-dimension shape that closed and has four sides. It come from latin words, “quadri” means four and “lateral” means sides. The internal angle is 360°. In real life, there are many things that has quadrilateral shape. For example: table top, book, picture, kite, envelope, etc. Quadrilateral Properties There are two

Rhombus: Definition, Properties, Area, Perimeter, Examples

What Is Rhombus Geometry has some type of shape. Especially in plane geometry, one type of quadrilateral is rhombus. Specifically, rhombus is special type of parallelogram that has four sides that has same length. It is like square, but the angles in rhombus need not be right angles. Beside that it is also has diagonals

Vertical Angles

Definition Vertical Angles are the angles opposite each other when two lines cross In this case, “Vertical” means they share the same corner point (Vertex), not the usual meaning of up-down. Example a° and b° are vertical angles. Vertical Angles are Congruent Angles The interesting thing here is that vertical angles are congruent angles: a°

Prisms: Definition, Properties, Types, Surface Area, Volume, Examples

Prisms has many types depends on the base. There are many daily things in prisms such as aquarium, tent, tissue box, cupboard, etc.. Definition of Prisms Prisms is three-dimensional shape that is bordered by two bases and lateral planes. Number of lateral planes is same with number of edges of the base. Consequently, type of