Question

Solve this question.

Answer 1

1)A(∆ABC)=1/2 of A(BACE) (therefore BACE=BCDE )
A(∆ABC)=1/2 of A(BCDE)
A(∆ABC)=1/2×40
A(∆ABC)= 20
2)A(∆ABC)=A(∆BCE) (same base)
A(∆BCE)=20
3)A(∆ABC)=A(∆BCD) (same base)
A(∆ABC)/A(∆BCD)
A(∆ABC)/(A(∆ABC)
=1