March 15, 2016 Grade 9, Lines and Angles, Math

Lines and Angles Angle is the amount of turn between two straight lines that have a common end point (the vertex). A line is a collection of points along a straight path that goes on and on in opposite directions. A line has no endpoints.Watch Lines Angles Videos to learn more. A true line in geometry […]

Definition One of the theorem of a circle is states that angles in the same segment of a circle are equal. Watch Angle In A Same Segment Video to learn more. Angle In A Same Segment Suppose we join points P and Q and form a chord PQ in the above figures. Then ∠ PAQ […]

March 11, 2016 Constructions, Grade 9, Math

Definition A triangle is a 3 sided polygon sometimes (but not very commonly) called the trigon. Every triangle has three sides and three angles, some of which may be the same. We can construct triangle in different given measurement. Watch Construction Of Triangle Video to learn more. Triangle Construction It’s time to build. Geometry is awesome because you […]

March 11, 2016 Constructions, Grade 9, Math

Definition A rhombus is a parallelogram with four congruent sides. If a parallelogram has two consecutive sides congruent, it is a rhombus. A rhombus looks like a diamond. Watch Construction of Rhombus Video to learn more. Rhombus A Rhombus is a flat shape with 4 equal straight sides. Also opposite sides are parallel and opposite angles are equal. It […]

March 11, 2016 Constructions, Grade 9, Math

Definition A square is a quadrilateral with four right angles and four congruent sides. A square has four sides that are all the same length and whose angles are all right angles measuring 90 degrees. Watch Construction of Square Video to learn more. Square A Square is a flat shape with 4 equal sides and […]

March 11, 2016 Constructions, Grade 9, Math

Definition Trapezium is a quadrilateral with one pair of sides parallel. We can calculate the area of trapezium by the equation, ½×(a + b)×h, where a, b = sides, h = height.Watch Construction of Trapezium Video to learn more. A quadrilateral is a simple closed figure bounded by four sides. A trapezium is a type of a quadrilateral […]

March 10, 2016 Constructions, Grade 9, Math

Definition A triangle is a 3-sided polygon sometimes called the trigon. Every triangle has three sides and three angles, some of which may be the same. An equilateral triangle is a triangle in which all three sides are equal. By constructing an equilateral triangle inside in a circle is called inscribed equilateral triangle in a circle.watch Inscribed Equilateral Triangle In […]

March 10, 2016 Constructions, Grade 9, Math

Definition A triangle is a 3-sided polygon sometimes called the trigon. Every triangle has three sides and three angles, some of which may be the same. By constructing a triangle inside in a circle is called inscribed triangle inside a circle. Step 1: Use the given center and the straightedge to construct a radius of the circle. Use […]

March 10, 2016 Constructions, Grade 9, Math

Inscribed Square Inside a Circle Square is a plane figure with four equal straight sides and four right angles. The inscribed square inside a circle is defined as the circle inscribes the square. Or the inscribed square is defined as the square is inside in the circle or circle is outside in the square.watch Inscribed Square […]

March 10, 2016 Constructions, Grade 9, Math

Equal Area Triangle To a Given Rectangle A triangle is a 3 sided polygon sometimes (but not very commonly) called the trigon. Every triangle has three sides and three angles, some of which may be the same. Rectangle is a plane figure with four straight sides and four right angles, especially one with unequal adjacent sides, in […]

March 10, 2016 Constructions, Grade 9, Math

Triangle Equal In Area To a Given Quadrilateral A triangle is a 3 sided polygon sometimes (but not very commonly) called the trigon. Every triangle has three sides and three angles, some of which may be the same. A quadrilateral is a four-sided polygon with four angles. There are many kinds of quadrilaterals. The five most common types are […]

March 10, 2016 Coordinate Geometry, Grade 9, Math

Section Formula Consider the line joining the points A(x1,y1) and B(x2,y2). Suppose that we want to find the ratio of division of the line joining the points A and B at a point P(x,y) on it or we want to find the point of division of the line joining the points A and B in […]

Segment of a Circle Videos The collection of all the points in a plane, which are at a fixed distance from a fixed point in the plane, is called a circle. A segment is the section of a circle enclosed by a chord and an arc.watch Segment of a Circle Videos to learn more.. A segment is […]

Definition The collection of all the points in a plane, which are at a fixed distance from a fixed point in the plane, is called a circle. A sector of a circle is the section enclosed by two radii (the two sides of the slice) and an arc (the crust).watch Sector of a Circle Videos to learn […]

Circle A circle is the set of all points in a plane that are at a given distance from a given point, the centre; equivalently it is the curve traced out by a point that moves so that its distance from a given point is constant. The radius of a circle is the distance from the center […]

Triangle A triangle is a closed figure in a plane consisting of three segments called sides. Any two sides intersect in exactly one point called a vertex.Watch Triangle Video to learn more. A triangle is named using the capital letters assigned to its vertices in a clockwise or counterclockwise direction. For example, the triangle below […]

March 10, 2016 Grade 9, Lines and Angles, Math

SYMMETRY Symmetry is the quality of being made up of exactly similar parts facing each other or around an axis.Watch SYMMETRY VIDEO to learn more. Symmetry comes from a Greek word meaning ‘to measure together’ and is widely used in the study of geometry. Mathematically, symmetry means that one shape becomes exactly like another when you move […]

March 10, 2016 Grade 9, Math, Surface Areas and Volumes

CUBE A cuboid, whose length, breadth and height are all equal, is called a cube. A cube has 6 equal and plane surfaces. All the faces of a cube are square in shape. Watch CUBE VIDEO to learn more…. The perimeter of a shape is defined as the distance around the shape. If each edge […]

March 10, 2016 Grade 9, Math, Surface Areas and Volumes

CUBOID The cuboid has 6 rectangular faces. The opposite rectangular plane surfaces are identical (equal in all respects). It has 8 vertices and 12 edges.Watch CUBOID VIDEO to learn more.. The perimeter of a shape is defined as the distance around the shape. Surface Area of a Cuboid = 2(lb + bh + hl), where […]

March 10, 2016 Grade 9, Math, Statistics

MEAN The “Mean” is computed by adding all of the numbers in the data together and dividing by the number elements contained in the data set.Watch MEAN VIDEO tio learn more.. To calculate the arithmetic mean of a set of data, add up (sum) all of the data values (x) and then divide the result […]

March 10, 2016 Grade 9, Math, Statistics

MEDIAN The median value of a set of data is the middle value of the ordered data. That is, the data must be put in numerical order first. The “Median” of a data set is dependant on whether the number of elements in the data set is odd or even.Watch MEDIAN to learn more. First […]

March 10, 2016 Grade 9, Math, Statistics

MODE The modal value of a set of data is the most frequently occurring value. The “Mode” for a data set is the element that occurs the most often. It is not uncommon for a data set to have more than one mode. This happens when two or more elements accur with equal frequency in […]

EQUAL ANGLES SUBTENDS CONGRUENT ARCS In a circle the angle subtended by the two arcs are equal , then these two arcs are called congruent.Watch Congruent Arcs Videos to learn more. If two arcs of a circle are congruent , if the angles subtended by them at the centre are equal. If two central angles […]

March 9, 2016 Coordinate Geometry, Grade 9, Math

Regular Polygon Polygons are often defined by the number of sides that they have. A polygon is a flat shape with straight sides. A closed plane figure made up of several line segments that are joined together. The sides do not cross each other. A regular polygon is a polygon with all equal sides and angles.watch Regular Polygon Videos to […]