4MA0 Foundation June 2017 Paper 1R Q5

5 The diagram shows the design for a flag.

Rectangular flag with a triangle T on the left, a Y-shaped band with an angle x marked, and a shaded quadrilateral A at the bottom right with two right angles
(a) What type of angle is marked \(x\)? (1)

Triangle T is an equilateral triangle.

(b) What is the size of each angle in an equilateral triangle? (1)
(c) Write down the mathematical name for the shaded quadrilateral A. (1)