3 years ago

Find the surface area of composite figures

Mathematics

2 answers:

Aleonysh [2.5K]3 years ago

6 0

Answer:

429 cm²

Step-by-step explanation:

A(blue) =

= 2×6cm×10cm + 2×6cm×8cm + 8cm×10cm + (8cm×10cm - 5cm×4cm)

= 120cm² + 96cm² + 80cm² + 60cm²

= 356 cm²

A(green) =

= 4cm×5cm + 2×5cm×5cm/2 + 4cm×7cm

= 20cm² + 25cm² + 28cm²

= 73 cm²

A(total) =

= A(blue) + A(green)

= 356 cm² + 73 cm²

= 429 cm²

AfilCa [17]3 years ago

4 0

The answer is 429 cm^2

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