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- When measures of one side and one angle are given DEMO
- Problem 1: When measures of one side and one angle are given
- when measures of hypotenuse and one Acute angle are given
- Problem 1: when measures of hypotenuse and one angle are given
- When measures of two sides are given
- Problem 1: When measures of two sides are given
- When measures of hypotenuse and one side are given
- Problem 1: When measures of hypotenuse and one side are given
- Concept of Angle of Elevation & Depression
- Problem 1: Concept of Angle of Elevation & Depression
- Engineering and Heights and Distances
- More on Engineering and Heights and Distances
- Problem1-Engineering and Heights and Distances
- Problem2-Engineering and Heights and Distances
- Application of the Sine Rule
- Problem2-The Cosine Rule

- Half Angle Formulas DEMO
- Problem-The Sine of Half the Angle Formula
- The Cosine of Half the Angle in Terms of the Sides
- Problem-The Cosine of Half the Angle in Terms of the Sides
- The Tangents of Half the Angle in Terms of the Sides
- Problem-The Tangents of Half the Angle in Terms of the Sides
- Bearing
- Compass and True Bearing
- Concept of Oblique Triangles
- Problem-Concept of Oblique Triangles
- When Measures of One Side and Two Angles are Given
- Problem-When Measures of One Side and Two Angles are Given
- When Measures of Two Side and Their Included Angles are Given
- Problem-When Measures of Two Side and Their Included Angles are Given
- When Measures of Three Sides are Given

- Area of Triangle DEMO
- Area of Triangle by Measuring One Side and Two Angle
- Area of Triangle by Measuring Three Sides
- Problem-Area of Eqilateral Triangle With Given Sides
- Area of Equilateral Triangle with Given Sides
- More on Area of a Triangle with Given Sides

- Relation Among Radius, Circum-Angle & Chord of a Circum-Circle
- More on Relation Among Radius, Circum-Angle & Chord of a Circum-Circle
- Problem1-Relation Among Radius, Circum-Angle & Chord of a Circum-Circ

- Relation Among Radius, Circum-Angle & Chord of a Circum-Circle
- More on Relation Among Radius, Circum-Angle & Chord of a Circum-Circle
- Problem1-Relation Among Radius, Circum-Angle & Chord of a Circum-Circ

- Relation Among In-Radius, Perimeter & Area of Triangle
- Problem-Relation Among In-Radius, Perimeter & Area of Triangle