Similarity: Unknown Lengths

Determine the scale factor of enlargement from a triangle with sides 12, 5, and 13 to a triangle with sides 24, 10, and 26.
Bepaal die skaalfaktor van vergroting van 'n driehoek met sye 12, 5, en 13 na 'n driehoek met sye 24, 10, en 26.

• 1

• 2

• 3

• 4

Determine the reciprocal of the scale factor 2.
Bepaal die resiprook van die skaalfaktor 2.

• ⅓

• 2

• ½

• 3

13 ÷ 5 will be the same as 26 ÷ .... ?

13 ÷ 5 sal dieselfde wees as 26 ÷ .... ?

(a)  

12 ÷ 13 will be the same as 24 ÷ ....?

12 ÷ 13 sal dieselfde wees as 24 ÷ ....?

(a)  

Give the reason as why these angles are the same?

Gee die rede waarom hierdie hoeke dieselfde is?

• Vertically opposite angles / Regoorstaande hoeke

• Alternate angles / Verwisselende hoeke

• Corresponding angles / Ooreenkomstige hoeke

• Co-interior angles / Ko-binnehoeke

Give the reason as why these angles are the same?

Gee die rede waarom hierdie hoeke dieselfde is?

• Vertically opposite angles / Regoorstaande hoeke

• Alternating angles / Verwisselende hoeke

• Corresponding angles / Ooreenkomstige hoeke

• Co-interior angles / Ko-binnehoeke

Give the reason as why these angles are the same?

Gee die rede waarom hierdie hoeke dieselfde is?

• Vertically opposite angles / Regoorstaande hoeke

• Alternating angles / Verwisselende hoeke

• Corresponding angles / Ooreenkomstige hoeke

• Co-interior angles / Ko-binnehoeke

Determine the value of y.

Bepaal die waarde van y.

• 13cm

• 8cm

• 6,5cm

• 26cm

Determine the value of x.

Bepaal die waarde van x.

• 8cm

• 20cm

• 4cm

• 16cm

If two triangles are similar, what can be said about their corresponding sides?

As twee driehoeke gelykvormig is, wat kan oor hulle ooreenstemmende sye gesê word?

• They are equal / Hulle is gelyk

• They are random / Hulle is random

• They are proportional / Hulle is in verhouding

• They are not different / Hulle is nie anders nie