Perimeter and areaIB MYP Maths Standard: Mind map

Exam questions on Perimeter and area

1. A sector $OAB$ of a circle has centre $O$, radius $12$ cm and angle $AOB=75^\circ$. Use the $\pi$ button on your calculator.
   Find the perimeter of the sector.2 marks
2. A trapezium has parallel sides of length $9$ cm and $15$ cm. The perpendicular distance between the parallel sides is $6$ cm.
   A triangle has a base of $15$ cm and the same area as the trapezium. Find its perpendicular height.2 marks
3. A window is made from a rectangle $1.2$ m wide and $1.5$ m high, with an isosceles triangle on top. The triangle has a base of $1.2$ m, a perpendicular height of $0.5$ m, and each of its sloping sides is $0.78$ m long.
   Find the total area of the window.3 marks