area of quadrilaterals
TRANSCRIPT
P1
P2
dA
B
C
D
∆ ADC and ∆ ABCThey have same base (AB).
P1
dA
C
D
P2
A
B
C
d
= dP1+ dP2_
= d(P1+ P2)
_1
21
2
1
2
_
TRANSCRIPT
P1
P2
dA
B
C
D
∆ ADC and ∆ ABCThey have same base (AB).
P1
dA
C
D
P2
A
B
C
d
= dP1+ dP2_
= d(P1+ P2)
_1
21
2
1
2
_