Answer:
The best way to measure an angle is to use a protractor. To do this, you'll start by lining up one ray along the 0-degree line on the protractor. Then, line up the vertex with the midpoint of the protractor. Follow the second ray to determine the angle's measurement to the nearest degree.
Step-by-step explanation:
Answer:
21) Angle A = 44 degrees
22) Angle A = 23 degrees
Step-by-step explanation:
The angles inside of every triangle always add up to 180 degrees, you can use this trigonometric identity to solve for x values:
Problem 21)
X + 59 + X + 51 + 84 = 180
2x + 194 = 180
2x = -14
x = -7
now solve for angle A:
Angle A = x + 51 = -7 + 51 = 44 degrees
Problem 22)
The square symbol inside a triangle denotes a 90 degree angle. Setting the angles equal to 180 degrees, you can find angle A again.
90 + x + 37 + x + 67 = 180
2x + 194 = 180
2x = -14
x = -7
now solve for angle A:
Angle A = -14 + 37 = 23 degrees
