Henry Park Pri Sch 2007 PSLE Math Prelim Q44

Study the diagram below.
a) What is the sum of Angle a, Angle b, Angle c, Angle d, Angle e and Angle f?


Solution

Angles on a straight line = 180 degrees
3 straight lines will have a total of 180 degrees x 3 = 540 degrees
Sum of all Angles a to f -----
540 degrees – sum of angles of triangle
= (540 – 180) degrees
= 360 degrees (Answer)


The figure below shows a rectangle and a triangle.
b) What is the sum of Angle p + Angle q?


Solution

Sum of interior angles of 2 parallel lines ----- 180 degrees (Answer)