# reSolve: Pythagoras' Theorem: Phone Finding

This lesson challenges students to apply Pythagoras' Theorem to explore a practical real-world problem. Students explore technology reliant on mathematical concepts. The lesson is outlined in detail including curriculum links, vocabulary, materials needed, sample answers, discussion points and student resources such as spreadsheets. This sequence is part of the reSolve: Maths by Inquiry program.

Year level(s) Year 9
Audience Teacher
Purpose Teaching resource
Teaching strategies and pedagogical approaches Mathematics investigation
Keywords ratios scale, proportion, Pythagoras' Theorem, right-angled triangles, ratios

## Curriculum alignment

Curriculum connections Numeracy
Strand and focus Geometry, Measurement, Build understanding, Apply understanding
Topics Proportion, rates and ratios, Pythagoras and trigonometry
AC: Mathematics content descriptions
ACMMG221 Solve problems using ratio and scale factors in similar figures
ACMMG222 Investigate Pythagoras’ Theorem and its application to solving simple problems involving right angled triangles
National numeracy learning progression Comparing units (ratios, rates and proportion)
Understanding geometric properties - UGP6