Similarity & Congruence
ACT · Flashcards · Application
ACT · FLASHCARDS
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QUESTION
Identify if triangles with angles 30°, 60°, 90° and 30°, 60°, 90° are similar.
QUESTION
Calculate the scale factor:
△
A
B
C
∼
△
D
E
F
\triangle ABC \sim \triangle DEF
△
A
B
C
∼
△
D
E
F
,
A
B
=
4
AB = 4
A
B
=
4
,
D
E
=
8
DE = 8
D
E
=
8
.
QUESTION
Find the new area: a figure has area
18
18
18
and is dilated by
k
=
3
k=3
k
=
3
; what is the new area?
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ANSWER
162
162
162
. New area is
18
×
3
2
=
18
×
9
=
162
18 \times 3^2 = 18 \times 9 = 162
18
×
3
2
=
18
×
9
=
162
.
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