Чему равна сумма углов: \(\displaystyle 69^{\circ}3^{\prime}43^{\prime \prime}+18^{\circ}\)?

• \(\displaystyle 69^{\circ}21^{\prime}43^{\prime \prime}\)
• \(\displaystyle 69^{\circ}3^{\prime}61^{\prime \prime}\)
• \(\displaystyle 87^{\circ}3^{\prime}43^{\prime \prime}\)
• \(\displaystyle 69^{\circ}3^{\prime}21^{\prime \prime}\)