drafting

2. PerformBasicMensurationand
Calculation
MECHANICAL DRAFTING 8
TLE_ICTTD7/8MC-0g-2

3. Definition of Terms:
Geometrical figure composed of
two straight lines intersecting at
one of their extremities.
A_ _ _E
NGL

4. Definition of Terms:
Act or process of or result of
calculating
C_ _ _ _ _ _ _ _ _N
ALCULATIO

5. Definition of Terms:
Closed curve where all points are
equally distant from the center.
C_ _ _ _ E
IRCL

6. Definition of Terms:
Consist of two or more circles
with a common center.
C_ _ _ _ _ _ _ _C
ONCENTRI

7. Definition of Terms:
Number expressed in a counting
system that uses units of 10,
especially a decimal fraction.
D_ _ _ _ _L
ECIMA

8. Definition of Terms:
Number expressed in a counting
system that uses units of 10,
especially a decimal fraction.
D_ _ _ _ _ _ _N
IMENSIO

9. Definition of Terms:
System scaled in inches where
one foot equals 12 inches.
E_ _ _ _ _H
NGLIS

10. Definition of Terms:
Special kind of equation. It is a mathematical rule
expressing the relationship of two or more
quantities by means of numerals, variables and
operating symbols
F_ _ _ _ _A
ORMUL

11. Definition of Terms:
Characterized by straight lines,
regular curves, and angles.
G_ _ _ _ _ _ _ _ _ _ _ _E
EOMETRIC SHAP

12. Definition of Terms:
Lines which make a 900 angle
with each other.
P_ _ _ _ _ _ _ _ _ _ _R
ERPENDICULA

13. Definition of Terms:
Length of a straight line connecting
the center of a circle with a point on
the circumference of a circle.
R_ _ _ _S
ADIU

14. Definition of Terms:
Measure of reference.
S_ _ _ _ _ _D
TANDAR

20. Review
Convert the given fractions to
decimals.
1
8
0.125 = 125
1000

21. Review
Convert the given fractions to
decimals.
3
8
0.375 =
375
1000

22. Learning Objectives:
1. Identify the systems of
measurement;
2. Convert units of linear
measurement;
3. Appreciate the importance of
converting measurement from
English to Metric and vice versa.

23. English System
- provides a creative way on
how people can measure by
themselves.

24. Metric System
- is a decimal system of
measurement.
It exists in several variations
with different choices of basic
units.

25. The basic SI Unit (International
System of Unit) is called the
meter.
The meter is equivalent to
100 centimeters. Each
centimeter is composed of 10
millimeters.

27. English System of Measurement
12 inches (in) = 1 foot (ft)
3 feet (ft = 1 yard (yd)
1 yard (yd) = 36 inches (in)

28. English Conversion Table
1 inch (in) = 25.4 mm
= 2.54 cm
= 0.0254 m
1 foot (ft) = 304.8 mm
= 30.48 cm
= 0.3048 m

29. English Conversion Table
1 yard (yd) = 914.4 mm
= 91.44 cm
= 0.9144 m

30. Metric Conversion Table
1 millimeter (mm) = 0.03937 inch
1 centimeter = 0.3937 inch
1 meter = 39.37 inches

31. Conversion of Units of
Measurement
length in inch x 0.0254 = length in meter
length in inch x 2.54 = length in centimeter
length in feet 3.28 = length in meter
length in meter x 39.37 = length in inch
length in inch 39.37 = length in meter
length in feet x 0.305 = length in meter
length in feet x 30.5 = length in centimeter

32. Let’s Convert!
80 cm = _________ inch
1 inch = 2.54 cm
Solution:
80 cm x 1 inch
2.54 cm
80 x inch
2.54
= 31.496 inches

33. Let’s Convert!
4 inches = _______ cm
1 inch = 2.54 cm
Solution:
4 in x 2.54 cm
1 in
4 (2.54 cm)
1
= 10.16 cm

34. Let’s Convert!
75 cm = _______ m
1 m = 100 cm
Solution:
75 cm x 1 m
100 cm
75 m
100
= 0.75 m

35. Let’s Convert!
30 cm = _______ ft
1 ft = 30.48 cm
Solution:
30 cm x 1 ft
30.48 cm
30 x 1 ft
30.48
= 0.984 ft
30 ft
30.48

36. Activity
Convert the measurements and
round-off your answer to two
decimal places.

37. Calculate the following word problem by
converting the given unit to another unit. Show
your solution.
Problem #1 What is the answer if we convert 11
inches to centimeters?
Problem #2 How long is 16 meters in feet?
Problem #3 Shane measures the floor of his room
using a meter stick and its length measures 9
meters. What is 9 meters in inches?

38. Problem #1
What is the answer if we convert
11 inches to centimeters?

39. Problem #1
11 inches = _______ cm
1 inch = 2.54 cm
Solution:
11 in x 2.54 cm
1 in
11 (2.54 cm)
1
= 27.94 cm

40. Problem #2
How long is 16 meters in feet?

41. Problem #2
16 m = _______ ft
1 feet = 0.3048 m
Solution:
16 m x 1 ft
0.305 m
16 (1 ft)
0.305
= 52.49 ft

42. Problem #3
Shane measures the floor of his
room using a meter stick and its
length measures 9 meters. What
is 9 meters in inches?

43. Problem #3
9 m = _______ inches
1 inch = 0.0254 m
Solution:
9 m x 1 inch
0.0254 m
9 (1 inch)
0.0254
= 354.33 inches

44. I know …….
I will do ……
I will share ….

45. I know that the two Systems of
measurement are the English and Metric
System.
I will do the proper way and procedure in
converting linear measurements.
I will share this knowledge to my family
and friends.

46. YOU CANNOT
CONVERT PEOPLE
BEYOND YOUR OWN
CONVERSION