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Worksheets

Missing Parts of Triangles

Total questions: 13

Worksheet time: 13mins

Name
Class
Date
1.

Find the measure of each angle indicated. 

a)

40°

b)

33°

c)

30°

d)

29°

2.

What is the correct equation to solve for x ?

a)

tan( 46º ) = 17/x

b)

sin ( 46º ) = x/17

c)

tan (46º ) = x/17

d)

cos (46º) = x/17

3.

What is the length of side x?

a)

sin-1 = 28/14

b)

sin-1 = 14/28

c)

14sin28°

d)

14tan28°

4.

Find the measure of the missing angle.

a)

8o

b)

58o

c)

122o

d)

64o

5.

Find the measure of the missing angle.

a)

90o

b)

100

c)

130o

d)

50o

6.
What additional information is required to prove the two triangles are congruent by HL?
a)
A)
b)
B)
c)
C)
d)
D)
7.

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

a)

A)

b)

B)

c)

C)

d)

D)

8.

What additional information can we conclude from the given and why?

a)

∠ADB and ∠ADC are right angles because AD goes straight down.

b)

∠B≅∠C because the triangle is isosceles

c)

∠BAD≅∠CAD because they look the same

d)

None of the above

9.

When proving these triangles similar, what would you write in for the missing reason?

a)

Math

b)

Corresponding sides are proportional

c)

Corresponding sides are congruent

d)

SSS similarity postulate

10.

What reasons complete the proof?

a)

Given, AA Similarity Postulate

b)

Vertical Angle Theorem, AA Similarity Postulate

c)

Reflexive Property, SAS Similarity Postulate

d)

Definition of Angle Bisector, SSS Similarity Postulate

11.

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

a)

A)

b)

B)

c)

C)

d)

D)

12.

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

a)

A)

b)

B)

c)

C)

d)

D)

13.

Fill in the missing pieces of the proof.

a)

Transitive Property, SAS(Side-Angle-Side)

b)

Reflexive Property, SAS(Side-Angle-Side)

c)

Reflexive Property, Vertical Angles Thm.

d)

Transitive Property, SSS(Side-Side-Side)