Angles & Triangles

Classifying Angles

100

What do you call an angle has a measure less than 90 degrees?

                 

acute

200

What is the name of an angle that measures 180 degrees?

straight

300

Name this area

Reflex angle

400

If an angle measures 150 degrees, what type of angle is it?

obtuse

500

How many degrees could this angle be?

A) 45^o   B) 95^o   C) 155^o    D) 181^o

C) 155^o

What Makes Sense?

100

What is the best choice of measure for this angle?

A: 95^o, B: 85^o, C: 90^o, D: 105^o

B: 85^o

200

What measure makes sense?

A: 110^o, B: 65^o, C: 45^o, D: 145^o

A: 110^o

300

What measure makes sense?

A: 180^o, B: 200^o, C: 175^o, D: 90^o

D: 90^o

400

What is the measure of two right angles?

A: 89^o, B: 90^o, C: 180^o, D: 290^o

C: 180^o

500

How many degrees does a circle measure?

360 degrees

Naming Angles (not the type <ABC)

100

TUV or VUT

200

DEF or FED

300

Name the vertex?

Q

400

How many angles are in this picture?

3 angles

BCD, DCE, BCE

500

Name a pair of vertical angles. 

INM and JNL

INJ and MNL

Missing Angles

100

Find the missing angle x:

x = 40

200

Find the missing angle a: 

a = 30

300

Find the missing angle f:

f = 165

400

Find the missing angle x: 

x = 41

500

Find the missing angle d: 

d = 151 

Triangles

100

Can you make a triangle with these angle measurements?

80 degrees

10 degrees

70 degrees

No

80+10+70=160

200

How many unique triangles can you make with sides measuring 10, 22, and 12?

None

10+12>22

22>22 ----> not true!

300

Can you make a triangle with these angle measurements?

22 degrees

55 degrees

103 degrees

Yes

22+55+103=180

400

How many unique triangles can you make with these side measurements?

5 inches, 9 inches, and 6 inches

One

500

How many triangles can you make with these angle measurements?

22.5 degrees, 33.5 degrees, and 124 degrees.

An infinite amount of triangles. 

22.5+33.5+124=180