3-4

Question 1

triangle

Answer 1

closed figure made by 3 segments

Question 2

scalene triangle

Answer 2

no sides congruent

Question 3

isosceles triangle

Answer 3

at least 2 sides are congruent

Question 4

equilateral triangle

Answer 4

all sides are congruent

Question 5

acute triangle

Answer 5

all angles are acute

Question 6

right triangle

Answer 6

has one 90 degree (right) angle

Question 7

obtuse triangle

Answer 7

has one obtuse angle

Question 8

equiangular triangle

Answer 8

all angles are congruent

Question 9

interior angles

Answer 9

original angles

Question 10

exterior angles

Answer 10

the angles that form linear pairs with the interior angles

Question 11

(th 3-11)

the sum of the interior angles of a triangle is ______ degrees

Answer 11

triangle sum 180

180

Question 12

corollary

Answer 12

easily proved theorem related to a given theorem

Question 13

if two angles of one triangle are congruent to two angles of another triangle, the third angles are ______

Answer 13

3rd angle congruent

congruent

Question 14

each angle of an equilateral triangle measures ______

Answer 14

60 degrees

Question 15

in a triangle there can be at most one _____ angle or ______ angle

Answer 15

right, obtuse

Question 16

the acute angles of a right triangle are ______

Answer 16

complementary

Question 17

(th 3-12)

an exterior angle equals the sum of the ______

Answer 17

ext angle th

remote interior angles