Answer:
The measurement of the required angle = 116°
Step-by-step explanation:
Let the measure of its supplement = x
The measurement of the required angle = 2x - 12
x + 2x -12 = 180
3x - 12 = 180
3x = 180 + 12
3x = 192
x = 192/3
x = 64°
The measurement of the required angle = 2 * 64 - 12 = 128 - 12 = 116°
Answer:
c
Step-by-step explanation:
used socratic
Not really understanding the question, more info?
The amount of lines of symmetry of a shape is equal to the number of sides that shape has.
A heptagon has 7 sides, so, there are 7 lines of symmetry.
Best of Luck!