Answer:

1. A = l × w

= (30.5m)(45m)

= 1,372.5m²

2. A = s × s

=( 20m)(20m)

= 400m²

3. A = 1/2bh

= 1/2(10)(5)

= 1/2(50

= 50/2

= 25m²

4. A= πr²

= 3.1416(6cm)²

= 3.1416(36cm²)

= 113.09cm²

5. A = b × h

= (12m) × (7.5m)

= 90m²

6. A = 1/2h( b1 + b2)

= 1/2(5cm)(11cm + 7cm)

= 1/2(5cm)(18cm)

= 1/2(90cm²)

= 90cm²/2

= 45cm²

Answer:

Rec Area = l x w

= 45m x 30.5m

=1,372.5 m^2

Sqr Area = s x s or s^2

= 20 m x 20 m

= 400 m^2

Tri Area = 1/2(bh)

=1/2(10m x 5m)

=1/2(50m^2)

=25m^2

Crcl Area = pi x r^2

=3.14 x (6cm)^2

=3.14 x 36cm^2

=113.04 cm^2

prrlll Area = b x h

= 12m x 7.5m

= 90m^2

trpzd Area = 1/2h (b1 + b2)

= 1/2 5cm(7cm+11cm)

=1/2 5cm(18cm)

=1/2 90cm^2

=45cm^2