Answer:
Step-by-step explanation:
# 34.
A ≈ 14² - 3.14 × 7² = 42.14 cm²
# 35.
A ≈ [tex]\frac{20^2 - 3.14 * 10^2}{2}[/tex] = 43
# 36.
A = 14² - 4 × 5² = 196 - 100 = 96 m²
