quick check conjectures

To fully disprove a conjecture, one needs to find only ONE counterexample.

• True

• False

Tags

CCSS.L.11-12.4C

CCSS.L.6.4C

CCSS.L.7.4C

CCSS.L.8.4C

CCSS.L.9-10.4C

How many counters would come next?

• 5
• 7
• 9
• 11

Tags

CCSS.4.OA.C.5

Find the next term in the sequence:
A, D, G, J, _____

• L
• M
• P
• K

Tags

CCSS.RF.3.3B

CCSS.RF.3.3C

CCSS.RF.3.3D

CCSS.RF.4.3A

CCSS.RF.5.3A

If an animal is furry, then it is a hamster. What would be an appropriate counterexample?

(Remember counter example is one more example besides the one given)

• goldfish
• frog
• elephant
• cat

If it is an angle, then it is acute. What is an appropriate counterexample?

• 70⁰
• 45⁰
• 120⁰
• True. There is no counterexample.

Tags

CCSS.7.G.B.5

Which is a counterexample to the following statement?

If an angle is obtuse, then it is $125\degree$ .

•  $90\degree$  

•  $57\degree$  

•  $160\degree$  

•  $80\degree$  

Make a conjecture about the geometric relationship.

∠1 and ∠2 are supplementary angles

• ∠1 + ∠2 = 90

• ∠1 = ∠2

• ∠1 and ∠2 are complementary

• ∠1 + ∠2 = 180

Tags

CCSS.7.G.B.5

Make a conjecture about the geometric relationship.

∠1 and ∠2 are vertical angles

• ∠1 + ∠2 = 90

• ∠1 = ∠2

• ∠1 and ∠2 are complementary

• ∠1 + ∠2 = 180

Tags

CCSS.7.G.B.5

Make a conjecture about the geometric relationship.

Point S is between R and T

• RS = ST

• S is the midpoint of RT

• RS + ST = RT

• Point R is the midpoint

Tags

CCSS.HSG.CO.A.1

If it is an angle, then it is acute. What is an appropriate counterexample?

• 70⁰
• 45⁰
• 120⁰
• True. There is no counterexample.

Tags

CCSS.7.G.B.5