MATH LINES. A GUIDE LESSON FOR GRADE SEVEN

nothing but for grade 7 student

1. QUARTER III
“ MATHEMATICS
(Kinds of Line)

PARALLEL LINES
AND
TRANS LESA

2. line a | | line 6
“line a is parallel to line b”

PARALLEL LINES

ne

RES
line AB aes | line CD
“AB is parallel to m?

The arrow symbol on the
line suggests that two lines
are parallel.

m

n

Parallel lines are ie lines that do not intersect

3. SKEW LINES

* Skew lines are non-coplanar lines that do not intersect and are not
parallel.

AB and CD are skew lines because the
lines do not intersect and AB is not on
the plane where CD lies.

4. Let’s Try!

Complete the statement.
ME ||
RT ||
KT ||
AD ||
IK and
are skew lines.
AD and
are skew lines.
7. RM and
are skew lines.

BS ES BS

fen

5. Let’s Try!

Complete the statement.
ME|| __RAor KI _
RT ||
KT ||
AD ||
IK and
are skew lines.
AD and
are skew lines.
7. RM and
are skew lines.

DOS

fen

6. Let’s Try!

Complete the statement.
ME || __RA or KI
RT || __MK or AD

DS A =
ES
=

are skew lines.
AD and Ea
are skew lines.
7. RMand
are skew lines.

a

7. Let’s Try!

Complete the statement.

1. ME|| _RAorKI

2. RT || __MK or AD

3. KT || __MRorID

4. AD ||

5. IK and
are skew lines.

CAD) an A
are skew lines.

7. RM and

are skew lines.

8. Let’s Try!

Complete the statement.

fen

A EN

ME || RA or KI
RT || __MK or AD
KT || __MRorID
AD || __El or RT
IK and

are skew lines.

AD and

are skew lines.

. RM and
are skew lines.

et

Se

A
°

en

Ne

ed

OT

9. Let’s Try!

Complete the statement.

1. ME|| ___RAorKI__

2. RT || __MK or AD _

3. KT || _MRorID _

4. AD || _Elor RT _

5. TK and _AD, RT, AE or RM_
are skew lines.

6. AD and
are skew lines.

7. RM and

are skew lines.

10. Let’s Try!

Complete the statement.

Su aD

>

. RM and

ME || RA or KI

RT || __MK or AD

KT || __MR or ID

En) fe SE ae
IK and AD, RT, AE or RM
are skew lines.

AD and__EMorIK e
are skew lines.

are skew lines.

11. Let’s Try!

Complete the statement.

1. ME|| __RAorKI _
2. RT || __MK or AD _
3. KT || __MRorID _
4. AD || __ElorRT
5. TK and _AD, RT, AE or RM__

are skew lines.
AD and__EMorIK

are skew lines.
7. RMand_IKorDT
are skew lines.

=

12. TRANSVERSAL
« A transversal is a line intersecting two or more coplanar lines at different
points.
e e D

a (3

line cis the transversal line Lis the transversal
because it intersects because it intersects

line a and line & line m and line n

no transversal shown
in the figure.

13. ANGLES FORMED BY TRANSVERSAL

For two coplanar lines; Interior angles Exterior angles

23,24,25and26 1,212,217 and 28
A Z2and/25 Ziand 26
Corresponding angles 73 and /7 24 and 28

Alternate Alternate
Interior angles Exterior angles
23 and 26 22 and 28
Mand’ 5 Z1 and 27
5 Interior angles on Exterior angles on
Exterior part = Ñ
A the same side the same side