Answer:
A = 4 cm²
Step-by-step explanation:
The area of a triangle is calculated as
A =
bh ( b is the base and h the perpendicular height )
b = AC = 3
+
= 4
h = BD
Calculate BD using Pythagoras' identity in Δ ABD
BD² = AB² - AD²
= (2
)² - (3
)²
= 20 - 18 = 2 ( take square root of both sides )
BD = 
Then
A =
× 4
×
= 2 ×
×
= 4 cm²
Answer:
The coordinates of point R are (7,6), second option
Step-by-step explanation:
Coordinates of point R:
The coordinates of point R are , so (6,-7).
90° counterclockwise rule:
The rule for a rotation of 90º counterclockwise is given by:
(x,y) -> (-y,x)
What are the coordinates of point R?
(6,-7) -> (-(-7),6) = (7,6).
The coordinates of point R are (7,6), second option
Factoring is an important process that helps us understand more about our equations. Through factoring, we rewrite our polynomials in a simpler form.
It is used in asset (stock) valuation. It is used in bond trading and mortgage calculations.