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iGCSE (2021 Edition)

10.03 Scale factors

Interactive practice questions

Determine whether each statement is true or false:

a
"All circles are similar".

True

A

False

B
b
"All squares are similar".

True

A

False

B
c
"All isosceles triangles are similar".

True

A

False

B
d
"All equilateral triangles are similar".

True

A

False

B
e
"All right-angled isosceles triangles are similar".

True

A

False

B
Easy
< 1min

Determine the scale factor from the circle on the left to the circle on the right:

Easy
< 1min

The triangles in the diagram below are similar:

Easy
1min

The rectangles in the diagram below are similar:

Easy
< 1min
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Outcomes

0580C4.1

Use and interpret the geometrical terms: point, line, parallel, bearing, right angle, acute, obtuse and reflex angles, perpendicular, similarity and congruence. Use and interpret vocabulary of triangles, quadrilaterals, circles, polygons and simple solid figures including nets.

0580C4.4

Calculate lengths of similar figures.

0580E4.1

Use and interpret the geometrical terms: point, line, parallel, bearing, right angle, acute, obtuse and reflex angles, perpendicular, similarity and congruence. Use and interpret vocabulary of triangles, quadrilaterals, circles, polygons and simple solid figures including nets.

0580E4.4

Calculate lengths of similar figures. Use the relationships between areas of similar triangles, with corresponding results for similar figures and extension to volumes and surface areas of similar solids.

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