A) \( \Large 1600 cm^{2} \) |
B) \( \Large 500 cm^{2} \) |
C) \( \Large 1200 cm^{2} \) |
D) \( \Large 2400 cm^{2} \) |
D) \( \Large 2400 cm^{2} \) |
\( \Large ? = \sqrt{ \left(50\right)^{2}- \left(40\right)^{2} } = 30 \)
\( \Large A = \frac{1}{2} \times d_{1} \times d_{2}=\frac{1}{2} \times 80 \times 60
=\ 2400\ cm^{2} \)