Angles in Parallel Lines

Question 1

Angles that sum to 90 are called

Answer 1

complementary

Question 2

Angles that sum to 180 are called ____

Answer 2

supplementary

Question 3

Two angles on a straight line are called a ____

Answer 3

linear pair

Question 4

Lines that never meet are called ____

Answer 4

parallel

Question 5

Lines that meet at a right angle are called ____

Answer 5

perpendicular

Question 6

A line that intersects (crosses) two or more other lines (often parallel lines) is called a ____

Answer 6

transversal

Question 7

Parallel lines have so much in common!

It’s a shame that they will never ____

Answer 7

meet

Question 8

These angles are ____ and they are ____

Answer 8

corresponding

equal / congruent

Question 9

These angles are ____, they are ____

Answer 9

co-interior

supplementary (sum to 180)

Question 10

These angles are ____, they are ____

Answer 10

alternate

equal / congruent

Question 11

These angles are ____, they are ____

Answer 11

alternate exterior

equal / congruent

Question 12

The interior angles of a triangle sum to ____

Answer 12

180 degrees

Question 13

The interior angles of a quadrilateral add to ____

Answer 13

360 degrees

Question 14

The interior angles of a pentagon add to ____

Answer 14

540 degrees

Question 15

The exterior angles of any polygon sum to ____

Answer 15

360 degrees

Question 16

A 2D shape is also known as a ____

Answer 16

plane figure (as in, a flat shape)

Question 17

A 2D shape with 3 or more straight sides and angles is called a ____

Answer 17

polygon (poly means “many”)

Question 18

Is a circle a polygon?

Answer 18

No, because it doesn’t have straight sides

Question 19

What is the same and what is different about these two shapes?

Answer 19

They both have five sides, so they are both pentagons

The one on the left is a regular pentagon because all the sides and angles are the same, and the one on the right is irregular, because they are not the same.

Question 20

What is the difference between these two polygons?

Answer 20

The one on the left is convex (all interior angles are less than 180) and the one on the right is concave (not all interior angles are less than 180)

Question 21

These angles are ____, they are ____

Answer 21

vertical angles / vertically opposite angles

equal / congruent

Question 22

angles that have a common vertex and a common side are called ____

Answer 22

adjacent angles

Question 23

What is the name of this rule?

What is the relationship between the a, b, and d?

Answer 23

It’s called the exterior angle theorem.

d = a + b

The exterior angle of a triangle is equal to the sum of the two opposite interior angles

Question 24

Name this angle

Answer 24

∠ABC or ∠CBA

Question 25

m∠ABC

how do you express this angle notation in words?

Answer 25

“the measure of angle ABC”

Question 26

It has no size or shape, no dimensions, just a position. What is it?

Answer 26

a point

Question 27

A straight path of points that has no beginning or end. What is it?

Answer 27

a line

Question 28

A portion of a line that has two endpoints. What is it?

Answer 28

a line segment

Question 29

A line that has one endpoint and extends forever in the other direction

Answer 29

a ray

Question 30

The point exactly in the middle of a line segment, exactly halfway between two points, is called a ____

Answer 30

midpoint

Question 31

Two kinds of geometry are displayed here. What is the difference and what are they called?

Answer 31

On the left is “plane geometry”, the geometry of 2D shapes

On the right is “solid geometry”, the geometry of 3D shapes

Question 32

when lines meet at a point to form an angle, we call that point ____

Answer 32

a vertex