03-4geo writing proofs

If Malia lives on your street and you live on Rico's street, then Malia lives on Rico's street.

• True

• False

You and your friend have the same amount of money. Your friend spends $4 and you spend $6. You and your friend still have the same amount of money.

• True

• False

If x = 5 and y = 7, then 3x + 2y = 39.

• True

• False

Two congruent segments are each shortened by the same length. The segments are still congruent.

• True

• False

In ΔABC, m∠A = 75° and m∠B = 75°. Then AB = BC.

• True

• False

If an animal is a golden retriever, then it is a dog. Mac is a dog. Therefore, Mac is a golden retriever.

• Valid

• Invalid

If the temperature is below 32°F, then water will freeze. The temperature is 23°F. Therefore, water will freeze.

• Valid

• Invalid

All students must study. Emma studies. Therefore, Emma is a student.

• Valid

• Invalid

If a figure is a quadrilateral, then the figure has four sides. A pentagon does not have four sides. Therefore, a pentagon is not a quadrilateral.

• Valid

• Invalid

All trees have leaves. An oak is a tree. Therefore, an oak has leaves.

• Valid

• Invalid