The diagram shows a cyclic quadrilateral PQRS with its diagonals intersecting at K. which of the following triangles is similar to triangle QKR?

The diagram is a polygon. Find the largest angle of its interiorAngles 

The sum of the interior angles of a regular polygon is 1800^o. How many sides has the polygon?

In the diagram, $MN\parallel PO,$ $\angle PMN={{112}^{{}^\circ }},\angle PNO={{129}^{{}^\circ }}\angle NOP={{37}^{{}^\circ }}$ and$\angle MPN=y$ find the value of y

In the diagram, MN, PQ and RS are three intersecting straight lines, which of the following statement (s) is/are true?

i.  t = y

ii. x + y + z + m  = 180^o

iii x +m +n = 180^o

iv. x + n = m + z

In the diagram $MQ\parallel RS,\angle TUV={{70}^{\circ }}\text{and }\angle RLV={{30}^{\circ }}$ find the value of x

In $\Delta XYZ$ $\left| XY \right|=8cm,$$\left| YZ \right|=10cm$and $\left| XZ \right|=6cm$ which of theses relations is true?

Each exterior angle of a polygon is 30^o. Calculate the sum of the interior angles

In the diagram, $\overline{SR}$is parallel to $\overline{UW}$,$\angle WVT={{x}^{\circ }},\angle VUT={{y}^{\circ }},\angle RSV={{45}^{\circ }}$and $\angle VTU={{20}^{\circ }}$Calculate the value of y 

In the diagram, $\overline{SR}$is parallel to $\overline{UW}$,$\angle WVT={{x}^{\circ }},\angle VUT={{y}^{\circ }},\angle RSV={{45}^{\circ }}$and $\angle VTU={{20}^{\circ }}$Find the value of x