S

Phones

Cindy Ly3A

Point

A point is a location without shape of size. It has no dimensions.

The silver button represents a “point”

T

Line

A line has length and points and it has no width or thickness.

The edge of the iPhone represents a “line”

A

B

Line Segment A line segment is a straight line

which links two points without extending beyond them.

The edge of the phone represents a “line segment”. The line starts at point C and ends at point D without extending.

C

D

Ray A ray is a line with a start point but

no end point.

∞

The phone cord represents a “ray” because it is its start point and it extends infinitely. E

F

Opposite Rays Opposite rays must be collinear.

The bottom represents “opposite rays” because G is between H and I, then GH and GI.

G IH

Parallel Lines Parallel lines are two lines on a

plane that never meet and its always the same distance apart.

The parallel lines is represented by the left and right sides of the phone, J and K.

J K

Perpendicular Lines Perpendicular lines is lines meet or

crosses at right angles. (90˚)

This represents Perpendicular lines because the lines L and M meet.

L

M

Acute Angle A acute angle is an angle whose

measure is less than 90˚.

The gap between the two phones represents an acute angle because the measure is less than 90˚.

N P

O

Obtuse Angle A obtuse angle is an angle whose

measure is between 90˚ and 180˚.

This represents an “obtuse angle” because the measure of angle QRS is between 90˚ and 180˚.

Q

R

S

Right Angle A right angle is an angle whose

measure is exactly 90˚.

This phone represents a right angle because the measure of the corner is exactly 90˚

T

UV

Vertical Angles A vertical angle is a pair angles

whose sides form opposite rays.

≅

This represents “vertical angles” because the sides form opposite rays.

12

Adjacent Angles A adjacent angle is a pair of angles

with a shared vertex and a common side but do not have overlapping interiors.

This represents an “adjacent angle” because it has a pair of angles , 3 and 4, and a common side.

3

4

Intersecting Lines Intersecting lines is the point

where two lines meet or cross.

This represents “intersecting lines” because lines A and B intersected and point W is where the two lines crossed.

A

B

W

Intersecting Planes Intersecting planes is two planes

that meet in a single line.

This represents “intersecting planes” because planes C and D meet in line XY

C

DX

Y

Supplementary Angles A supplementary angle is a pair of

angles whose sum is 180˚.

This represents a “supplementary angle” because angle 5 and 6 has a sum of 180˚.

56

Complementary Angles A complementary angle is a pair of

angles whose sum is 90˚.

This represents a “complementary angle” because angles 7 and 8 have a sum of 90˚.

7 8

THE END