Can someone answer this ASAP I’m really confused?

Use δjkl and δmpn to determine whether don's claim is true or false. which of the following should don use to prove the triangles are similar? sss sas aas aa

The length of a rectangle plus its width is 24 cm. the area is 143 square cm. what are the length and width of the rectangle?

In a sale there is 25% of all prices a chair costs £45 in sale how much was it before the sale