Year 9 Mathematics

The proficiency strands understanding, fluency, problem-solving and reasoning are an integral part of mathematics content across the three content strands: number and algebra, measurement and geometry, and statistics and probability. The proficiencies …

Year 9 | Mathematics | F-10 curriculum

Achievement Standard Mathematics Year 9

By the end of Year 9, students solve problems involving simple interest. They interpret ratio and scale factors in similar figures. Students explain similarity of triangles. They recognise the connections between similarity and the trigonometric ratios. …

Achievement Standard | Achievement Standards | Year 9 | Mathematics | F-10 curriculum

ACMMG221

Solve problems using ratio and scale factors in similar figures

Elaborations ScOT Terms

ACMMG221 | Content Descriptions | Year 9 | Mathematics | F-10 curriculum

ACMMG223

Use similarity to investigate the constancy of the sine, cosine and tangent ratios for a given angle in right-angled triangles

Elaborations ScOT Terms

ACMMG223 | Content Descriptions | Year 9 | Mathematics | F-10 curriculum

Elaboration (1) ACMMG220

using the properties of similarity and ratio, and correct mathematical notation and language, to solve problems involving enlargement (for example, scale diagrams)

Elaboration (1) | ACMMG220 | Content Descriptions | Year 9 | Mathematics | F-10 curriculum

Elaboration ACMMG221

establishing the relationship between areas of similar figures and the ratio of corresponding sides (scale factor)

Elaboration | ACMMG221 | Content Descriptions | Year 9 | Mathematics | F-10 curriculum

Elaboration (1) ACMMG224

selecting and accurately using the correct trigonometric ratio to find unknown sides (adjacent, opposite and hypotenuse) and angles in right-angled triangles

Elaboration (1) | ACMMG224 | Content Descriptions | Year 9 | Mathematics | F-10 curriculum