# Numeracy wrap – tell me why

Secondary KLA:
Mathematics
Educational levels:
Year 7, Year 8, Year 9, Year 10 Interactive activities that guide students to consider the use and presentation of geometric reasoning.

## NSW syllabus outcomes

(MA4-17MG) classifies, describes and uses the properties of triangles and quadrilaterals, and determines congruent triangles to find unknown side lengths and angles

(MA4-3WM) recognises and explains mathematical relationships using reasoning

(MA5.2-1WM ) selects appropriate notations and conventions to communicate mathematical ideas and solutions

(MA5.2-3WM ) constructs arguments to prove and justify results

(MA5.2-14MG) calculates the angle sum of any polygon and uses minimum conditions to prove triangles are congruent or similar

## Australian curriculum content descriptions

(ACMMG141) Investigate, with and without digital technologies, angles on a straight line, angles at a point and vertically opposite angles. Use results to find unknown angles

(ACMMG166) Demonstrate that the angle sum of a triangle is 180° and use this to find the angle sum of a quadrilateral

Resource type:
Interactive Resource
ScOT topics:
Angles, Deductive Reasoning
File type:
text/html
Language/s:
en-AU
Author:
State of NSW, Department of Education
Publisher:
State of NSW, Department of Education
Date created:
Thursday, 1 November 2018

Resource ID: 9db3f195-f289-4b37-b8b7-d21d4c9e4d2b