Similar Shapes 1

Mathematics J.S.S 3 Second Term

Theme: Algebraic Process

Sub Theme: Algebraic Operation

WEEK 7

Similar Shapes 1

Performance Objectives

Students should be able to;

1. Identify similar figures: triangles, Rectangles, Squares, Cubes and cuboid
2. Identify the presence of similar shapes in the environment
3. Enlarge figures using scale factors

SIMILAR SHAPES

Content

SURFACE AREA OF SOLIDS

Two objects are similar if they have the same shape, so that one is an enlargement of the other.

Two objects are congruent if they are the same shape and size.

Corresponding angles are equal. Corresponding lengths are in the same ratio – they have the same Scale Factor. The scale factor is greater than 1 for an enlargement. The scale factor is smaller than 1 for a reduction.

EXAMPLES

Length of A/Length of B

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