EX
1. Find the areas of given polygons.
(a)
D
Go
4.5 cm
A
5 cm
12 cm
G
5.5 cm
B
Answers
Answer:
Ans is
Step-by-step explanation:
AD = 12cm
EF = 4.5cm
DC = 5cm
BG = 5.5cm
Area of the given polygon.
we, know that
Using this Formula we can find the area of whole polygon.
So,
In ∆AED
where,
AD = 12cm
EF = 4.5cm
So,
Now, In ∆ADC
where,
AD = 12cm
DC = 5cm
So,
Now, In ∆ABC
where,
BG = 5.5cm
AC = 12cm
So,
Area of whole polygon
Answer:
92.75 cm^2
Step-by-step explanation:
area of polygon abcdefg:
area of part 1 (triangle)+ area of part 2(triangle)+area of part 3 (triangle)
area of part 1 - 1/2 *b*h
1/2 *12*4.5
=27cm^2
area of part 2= 1/2*b*h
1/2*12*5
= 30 cm^2
area of part 3= 12^2+5^2
= 144+25
169= 169 square root
b= 13
area = 1/2*b*h
1/2*13*5.5
=35.75cm^2
area of polygon= 27+30+35.75
=92.75 cm^2(ans)