lesson
Using Scale in Geometric Problems
Solve problems involving scale drawings by applying ratio and proportion to find actual measurements.
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Angles, Similarity, and Scale
5 lessons
Goal
Apply angle properties of parallel lines and polygons, and use similarity and scale to find unknown angles and side lengths in geometric problems.
5 lessons
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Learning standards covered
AC9M9M03Australian Curriculum (v9) · Math · 9th Gradesolve spatial problems, applying angle properties, scale, similarity, Pythagoras’ theorem and trigonometry in right-angled triangles
Open Global Standard:OGM.10.GEO.7OGM.10.TRG.1
AC9M9M05Australian Curriculum (v9) · Math · 9th Gradeuse mathematical modelling to solve practical problems involving direct proportion, rates, ratio and scale, including financial contexts; formulate the problems and interpret solutions in terms of the situation; evaluate the model and report methods and findings
Open Global Standard:OGM.10.FNC.2
OGM.10.GEO.7OGM.10.TRG.1OGM.10.FNC.2