Answer:
521 mm²
Step-by-step explanation:
Hi there !
A = Asemicircle + Atrapeze
r = d/2 = 20mm/2 = 10mm
Asc = π·r²/2
= 3.14·(10mm)²/2
= 3.14×100mm²/2
= 157 mm²
At = (b + B)×h/2
= (20mm + 32mm)×14mm/2
= 52mm×7mm
= 364 mm²
= 157mm² + 364mm²
= 521 mm²
Good luck !
