Example: What is the area of a circle whose radius is 5 cm? Given: Radius(r) = 5 cm Area of a circle: πr2 = π x 52 = π x 25 = 25π sq cm
Example: Rails in a railway track
perpendicular
parallel
Example:
125 is a number.
composite
prime
Example: Are ∠AEC and ∠DEA adjacent angles?
E
C
A
B
D
False
True
Note: Trigonometric functions are the relationship between the sides and angles in a right triangle. Instructions: Read the name and select the correct definition.
Example:
7.8125
3.8862
>
=
<
Example: Line AB and Line CD are intersecting lines. If angle AEC is 40°, what is angle AED?
E
C
A
B
D
150°
140°
130°
Example: If angle AEC is 40° and angle DEC is 180° then what is angle DEA?