JSS1: MATHEMATICS - 3RD TERM
Statistics I | Week 12Topics|1 Quiz
Statistics II | Week 23Topics|1 Quiz
Statistics III | Week 35Topics|1 Quiz
Properties of Plane Shapes | Week 41Topic|1 Quiz
Solid Shapes and their Properties | Week 51Topic|1 Quiz
Angles: Measurement I | Week 62Topics|1 Quiz
Angles: Measurement II | Week 71Topic|1 Quiz
Angles between Lines | Week 85Topics|1 Quiz
Angles in a Triangle | Week 92Topics|1 Quiz
Supplementary angles are those angles that measure up to 180 degrees.
For example, angle 120° and angle 60° are supplementary because when we add 120° and 60° we get 180°.
If a = 50°, b = 70°, c = 60°,
a + b + c = 50° + 70° + 60° = 180°
Thus, supplementary angles add up to 180°
Note that adjacent angles on a straight line are said to be supplementary.
Find the value of y in the diagram below
50° + y° + 35° = 180° (supplementary angles)
y + 85° = 180°
y = 180° – 85°
y = 95°