Enlarging a Triangle
In this worksheet, students draw a triangle at numerous scales using enlargement, and then calculate its area at each scale.
The worksheet is part of a larger unit designed to teach students enlargements and their properties. Students compare, create, and analyse the properties of shapes after enlargement and complete grid enlargements of drawings.
Learning goals
- We are learning to enlarge an image, cartoons or shapes using digital technologies and grid reference systems.
- We are learning to describe and perform translations, reflections and rotations of shapes and to identify symmetries.
Curriculum alignment
AC9M5SP03
9
Describe and perform translations, reflections and rotations of shapes, using dynamic geometric software where appropriate; recognise what changes and what remains the same, and identify any symmetries
ACMMG115
8.4
Apply the enlargement transformation to familiar two dimensional shapes and explore the properties of the resulting image compared with the original
MA3-1WM
old
Describes and represents mathematical situations in a variety of ways using mathematical terminology and some conventions
MA3-2WM
old
Selects and applies appropriate problem- solving strategies, including the use of digital technologies, in undertaking investigations
MA3-3WM
old
Gives a valid reason for supporting one possible solution over another
MA3-15MG
old
Manipulates, classifies and draws two-dimensional shapes, including equilateral, isosceles and scalene triangles, and describes their properties
MA3-3DS-01
new
Visualises, sketches and constructs three-dimensional objects, including prisms and pyramids, making connections to two-dimensional representations
Australian Curriculum covers QLD / SA / WA / NT / TAS / ACT.