kienzie1
25.02.2020 •
Mathematics
Answer?........................
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Ответ:
The answer to your question is Area = 24, letter B
Step-by-step explanation:
Data
ABCD is a rectangle
BE = 4
DC = 12
CE = 5
Process
1.- Calculate the area of the ΔABD
Area ΔABD = base x height /2
= 12 x (5 + 4) /2
= 12 x 9/2
= 54
2.- Calculate the area of the ΔCDE
Area ΔCDE = 12 x 5/2
= 30
3.- Calculate the area of the rectangle ABCD
Area = 12 x 9
= 108
4.- Find the area of the ΔBDE
Area = A rectangle - A ΔABD - A ΔCDE
Area = 108 - 54 - 30
Area = 24
Ответ:
option B is the correct answer.
Step-by-step explanation:
In a rectangle, the opposite sides are equal. The diagonal, BD divides the rectangle into 2 equal right angle triangles.
To determine the area of BCD, we would apply the formula for determining the area of a triangle which is expressed as
Area = 1/2 × base × height
Base = 12
Height = 5 + 4 = 9
Area = 1/2 × 12 × 9 = 54
Area of triangle CDE would be
Area = 1/2 × 12 × 5 = 30
Therefore, area of triangle BED = area of triangle BCD - area of triangle CDE
Area of triangle BED = 54 - 30 = 24
Ответ:
6
Step-by-step explanation:
When I did the math on my calculator, i got 6