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Proving Similar Triangles Using AA, SSS and SAS

Total questions: 15

Worksheet time: 15mins

Name
Class
Date
1.

Determine whether the triangles are similar or not. If so, state how they are similar.

a)

Yes, by AA Similarity

b)

Yes, by SAS Similarity

c)

Yes, by SSS Similarity

d)

No, not similar

2.

What is the similarity statement for the triangle pair?

a)

ΔXYZ~ΔNEW

b)

ΔXZY~ΔNWE

c)

ΔZYX~ΔENW

d)

ΔYZX~ΔNWE

3.

Find the missing side using proportions.

a)

a

b)

b

c)

c

d)

d

4.

Find the missing side using proportions.

a)

a

b)

b

c)

c

d)

d

5.

How do these triangles appear to be similar?
(Hint: Look for non-labeled parts!)

a)

AA

b)

SAS

c)

SSS

d)

Not Similar

6.

How do these triangles appear to be similar?
(Hint: Look for non-labeled parts!)

a)

AA

b)

SAS

c)

SSS

d)

Not Similar

7.

Are the triangles similar?

a)

Yes

b)

No

8.

If two figures are similar, the corresponding sides are ______________.

a)

equal

b)

congruent

c)

proportional

d)

none of these

9.

How do these triangles appear to be similar?

a)

AA

b)

SAS

c)

SSS

d)

Not Similar

10.

The Angle-Angle Similarity (AA ~) Theorem states if two angles of one triangle are _______________ to two angles of another triangle, then the triangles are ____________________.

a)

adjacent; equal

b)

complementary; scalene

c)

congruent; similar

d)

supplementary; isosceles

11.

The Side-Angle-Side Similarity (SAS ~) Theorem states that if two sides of one triangle are ________________ to two sides of another triangle and their _________________ angles are congruent, then the triangles are similar.

a)

adjacent; intersect

b)

complementary; form

c)

adjacent; create

d)

proportional; included

12.

What additional information is required to prove the two triangles are congruent by SAS?

a)

A)

b)

B)

c)

C)

d)

D)

13.

Find side length X.

a)

16

b)

18

c)

2.4

d)

15

14.

The pair of figures are similar.
Find the missing side.

a)

x = 1

b)

x = 3

c)

x = 9

d)

x = 5

15.

Determine if the triangles are similar. Justify.

a)

Yes, SAS.

b)

Yes, AA.

c)

Yes, SSS.

d)

No, not similar.