Quadrilateral ABCD is inscribed in a circle as shown below.

Which statement must be true?

Find the sum of the following series. round to the nearest hundredth if necessary.

The diagram shows a 7cm by 6cm rectangle based pyramid. all the diagonal sides - ta, tb, tc and td are length 10cm. m is midpoint of rectangular base. work out height mt to 1 decimal place

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0