На сторонах AB и AD квадрата ABCD отмечены точки K и M Точка К делит сторону AB в отношении 1:4 cчитая от вершины А а точка М делит сторону АD в отношении 1:3 считая от вершины A . Определите какую часть площади квадрата ABCD состовляет площадь треугольника AKM

Написати у коректній формі: Ann's (older/elder) sister lived in Great Britain last year. Whose grandmother is (older/elder) - yours or Ivan's? Victoria is the (oldest/eldest) student in our class. Is Peter your (older/elder) or your younger brother? My uncle is the (oldest/eldest) member of the family. My cousin is two years (older/elder) than me. The building of our school is (older/elder) than all the others buildings in our town. Do you know that their (older/elder) son is a singer?

надо вставить предлоги..

Have  you  already  bought a tocket ... Lindon?The performance ... the theatre begins ... a quarter ... seven.And where  are  the ticket ... the pley , ...  the way?

How  did  you ravel ... last  summer?Did you  go ... the mountains ... car or did  you go ... foot?

Who will take part ... this work?I think many will because it's popular ...our pupils.

Where are out seats?i'm proud ... them.They are ... the stalls.I'm fond ... sitting ...  the  stalls as you  can see ... the stage very well.   

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Упростите выражение: Cos²α+Ctg²α-1/Sin²α

Установите, будет ли четырёхугольник с вершинами А(6; 7; 8;), В(8; 2; 6), С(4; 3; 2), D(2; 8; 4) параллелограммом? Если "да", то будет ли ромбом? Если "да", то будет квадратом?