Abeka Plane Geometry Test 1

true

two quantities that are equal to the same quantity are equal to each other.

true

a straight angle contains 180 degress

false

a right triangle may also be obtuse

true

an obtuse triangle may have only one obtuse angle

true

if two lines are perpendicular then they form right angles

true

if a triangle is equilateral it is also acute

false

if two angles are equal then they are supplementary

false

a bisector of one angle of a triangle is perpendicular to the side opposite that angle

false

two angles whose sum is a right angle are said to be supplementary

true

the legs of an isosceles triangle are equal

false

the whole is greater than the sum of its parts

sometimes

two angles that have a common side are____ adjacent

always

if equal quantities are multiplied by equal quantities the products are ____ eual

always

if two straight lines intersect the vertical angles formed are ___ equal

sometimes

two angles that are supplementary are ____ equal

always

an equilateral triangle is _____ equiangular

never

three angles that have a sum of 90 are ____ complementary

always

a bisector of a line segment _____ passes through the midpoint of the segment

always

the bisectors of two adjacent supplementary angles are ____ perpendicular to each other

sometimes

an obtuse triangle is ____ isosceles

always

the supplement of a right angle is ____ a right angle

no sides equal

a scalene triangle has___

supplementary

if the non common sides of two adjacent angles lie in opposite directions on a straight line then two angles are ____

right angle

an angle of 90 is ___

right angles

if two lines are perpendicular they form at the point of intersection___

two endpoints

a line segment has __

acute

if the sum of two angles is an obtuse angle at least one of the angles must be ___

decreases

as the size of an angle increases the size of its supplement ___

hypontenuse

In a right triangle, the side that is opposite the right angle is called the what?

equal

If two angles are vertical angles, then they are what?

sum

If equal quantities are added to equal quantities, the what are equal?

remainders

If equal quantities are subtracted from equal quantities the what are equal?

T

If an angle is labeled RTS the vertex lies at point what?

acute

If two angles, neither of which is a right angle, are complementary, they must both be what?

45 degrees

If two angles are both equal and complementary, their measures are what?

45 degrees

If a polygon has 8 sides, the size of an angle at the center is what?

obtuse

The supplement of an acute angle is a(n) what angle?

equal

If two quantities are equal to the same quantity, or to equal quantities, then they are what?