Calculator Activity
ANGLE CONVERSIONS
OBJECTIVE:
To make angle conversions by finding the missing angle of a polygon.
Angles can be expressed in degrees, radians and grads. Degrees can be
expressed in either decimal degrees or degrees-minutes-seconds.
Remember 180
=
radians = 200 grads. The formula for the sum of the
angles of an n-side polygon in degrees is 180(n-2). Before inputting an
angle for conversion, press
and then choose the
appropriate angular units.
1. Convert 45
to radians and grads.
STEP 1: Set the angular units to degrees by pressing
.
STEP 2: Enter 45 by pressing
.
STEP 3: Convert to radians by pressing
.
STEP 4: Convert to grads by pressing
.
2. Convert
"
58
'
23
11
to decimal degrees.
STEP 1: Enter
"
58
'
23
11
by pressing
.
STEP 2: Calculate decimal degrees by pressing
.
STEP 3: Convert to a decimal by pressing
.
3. Convert 2.718
to degrees-minutes-seconds.
STEP 1: Set the angular units to degrees by pressing
.
STEP 2: Enter 2.718
by pressing
.
STEP 3: Calculate degrees-minutes-seconds by pressing
.
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