If P \(=\left[\begin{array}{cc}x+3 & x+2\\
x+1 & x-1\end{array}\right]\) evaluate x if |P| = -10

A regular polygon has 150º as the size of each interior angle. How many sides does it have?

In the figure above , TS//XY and XY = TY, ∠STZ = 34°, ∠TXY = 47°, find the angle marked n?

If the hypotenuse of a right-angled isosceles triangle is 2cm. What is the area of the triangle?