The gradient of a line is \(-1\) and the line passes through the points $\left( {4,2} \right)$ and $\left( {a, – 3} \right)$.
Find the value of \(a \).

Find the interior angle of a 30-sided regular polygon.

Which of the following is a regular quadrilateral?

Find \(\theta \), correcting to the nearest degree, if the area of the triangle is 16 cm².

Find \(\theta \),  correcting to the nearest degree.

Find \(x\), correcting to one decimal place.

Find \(\theta \),  correcting to the nearest degree.

A boat sails on a bearing of  \(\text{S}30^\circ\text{W}\)  for 15 km, then changes direction and sails for 22 km. Its bearing from the starting point is now  \(\text{N}55^\circ\text{W}\).   Find the distance, to one decimal place, between the starting point and the current position.’

Given four angles \( 4x+30, 2x+40, 2x+40 \) and \( 2x-20 \) are in a quadrilateral, find \( x \).

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