Mathematics
Grade9
Easy
Question
The two angles that need to be added to make up the measure of angle d are
- Angle a and angle b
- Angle b and angle c
- Angle a and angle c
- Angle a and angle b and angle c
Hint:
If a side of a triangle is produced, then the exterior angle so formed is equal to the sum of the two interior opposite angles.
The correct answer is: Angle a and angle b
If a side of a triangle is produced, then the exterior angle so formed is equal to the sum of the two interior opposite angles. From the diagram angle d is the exterior angle and angle a and angle b are interior opposite angles.
So, a + b = d
Therefore, The two angles that need to be added to make up the measure of angle d are angle a and angle b.
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