Find missing lengths in similar shapes which have sides overlapping

Find missing lengths in similar shapes which have sides overlapping

Lesson details

Key learning points

  1. In this lesson, we will find missing side lengths for similar shapes which have side lengths overlapping

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3 Questions

Q1.
The two shapes are similar. What is the scale factor of the enlargement?
Correct answer: 2
3
4
5
Q2.
These two shapes are similar, what is the length of side marked x?
Correct answer: 10 cm
16 cm
2.5 cm
9 cm
Q3.
These two shapes are similar, what is the length of side marked x?
10 cm
16 cm
4 cm
Correct answer: 8 cm

3 Questions

Q1.
Triangle ABC is similar to triangle ADE. What is the length of side marked x? (not drawn to scale)
12 cm
15 cm
16 cm
Correct answer: 20 cm
Q2.
The diagram (not drawn to scale) shows two similar triangles. Work out the side length AD.
Correct answer: 16.5 cm
22 cm
27.5 cm
5.5 cm
Q3.
The diagram (not drawn to scale) shows two similar triangles. Work out the side length BD.
16.5 cm
22 cm
27.5 cm
Correct answer: 5.5 cm

Lesson appears in

UnitMaths / Similarity