Find the angles of a rhombus in which a diagonal length is equal to the length of a side.

Which expression is equivalent to 5r6141 2r+st6

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?