My composite shape

My composite shape

My composite shape has 2 triangles, A and B. It also has 2 squares, A and B. 

Area for triangle A:

Given: 

Base, b=4cm

Height, h=5cm
The area of triangle=bxh÷2

=4cmx5cm÷2

=20cm square÷2

=10cm square

Area for triangle B:

Given:

Base, b=4cm

Height, h=5cm

The area of triangle=bxh÷2

=4cmx5cm÷2

=20cm square÷2

=10cm square

Area for square A:

Given:

Length, l=5cm

Width, w=5cm

The area of square=lxw

=5cmx5cm

=25cm square

Area for square B:

Given:

Length, l=5cm

Width, w=5cm

The area of square=lxw

=5cmx5cm

=25cm square

Total area far composite shape:

Area for TA+Area for TB+Area for SA+Area for SB

=10cm square+10cm square+25cm square+25cm square

=70cm square