Grade 9 geometry of straight lines

SPACE & SHAPE (GEOMETRY)

Develop strong geometric reasoning and problem-solving skills for FET Phase Mathematics by mastering angle relationships, triangles, quadrilaterals, congruency, similarity and transformations.

CHOOSE COURSE

GEOMETRY OF STRAIGHT LINES

Understand the angle relationships formed by intersecting and parallel lines, and apply geometric reasoning to calculate unknown angles and justify answers.

ANGLES & RELATIONSHIPS

Develop geometric reasoning by applying angle properties and relationships to solve increasingly complex problems involving unknown angles.

TRIANGLES

Investigate the properties of triangles, including their sides and angles, and apply geometric reasoning to calculate unknown values and solve problems.

QUADRILATERALS

Explore the properties of quadrilaterals and use relationships between their sides, angles and diagonals to solve geometric problems.

CONGRUENCY & SIMILARITY

Understand the conditions for congruent and similar figures, and use corresponding sides and angles to solve geometric problems and justify relationships.

TRANSFORMATIONS

Explore translations, reflections and rotations on the Cartesian plane, and describe how transformations affect the position and orientation of geometric figures.

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