Two lines are if and only if they lie in the same plane and intersect at right angles.

incongruent

Im pretty sure this is right hope it helps.

I believe your answer to go in the blank should be bisectors. I hope this helps you! :)

i think there was a typo. you wrote pat brings 3 quarts of ice-cream to the party. each serving of ice-cream is 1 6 quart. how many total servings of ice-cream does pat bring to the party? i think the bold is supposed to be 1/6. so 1 quart of ice cream = 6 servings. 6 * 3 = 18.

the answer is 13 cm